./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.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_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB --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 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:11:26,157 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:11:26,260 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:11:26,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:11:26,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:11:26,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:11:26,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:11:26,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:11:26,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:11:26,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:11:26,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:11:26,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:11:26,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:11:26,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:11:26,312 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:11:26,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:11:26,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:11:26,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:11:26,314 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:11:26,315 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:11:26,315 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:11:26,315 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:11:26,315 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:11:26,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:11:26,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:11:26,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:11:26,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:26,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:11:26,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:26,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:11:26,317 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:11:26,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:11:26,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:11:26,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:11:26,318 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_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2024-11-28 05:11:26,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:11:26,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:11:26,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:11:26,611 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:11:26,611 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:11:26,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-28 05:11:30,263 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/data/8713624b4/af8b716dece845bcb802a3160d1a126f/FLAG681963571 [2024-11-28 05:11:30,554 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:11:30,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-28 05:11:30,562 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/data/8713624b4/af8b716dece845bcb802a3160d1a126f/FLAG681963571 [2024-11-28 05:11:30,579 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/data/8713624b4/af8b716dece845bcb802a3160d1a126f [2024-11-28 05:11:30,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:11:30,583 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:11:30,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:11:30,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:11:30,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:11:30,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:30,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5395310d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30, skipping insertion in model container [2024-11-28 05:11:30,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:30,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:11:30,848 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:11:30,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:11:30,864 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:11:30,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:11:30,918 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:11:30,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30 WrapperNode [2024-11-28 05:11:30,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:11:30,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:11:30,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:11:30,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:11:30,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:30,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:30,987 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 220 [2024-11-28 05:11:30,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:11:30,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:11:30,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:11:30,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:11:31,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,025 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-28 05:11:31,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,038 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:11:31,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:11:31,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:11:31,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:11:31,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (1/1) ... [2024-11-28 05:11:31,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:11:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:31,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:11:31,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 05:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:11:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:11:31,135 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:11:31,253 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:11:31,255 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:11:31,938 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:11:31,942 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:11:32,545 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:11:32,546 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 05:11:32,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:32 BoogieIcfgContainer [2024-11-28 05:11:32,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:11:32,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:11:32,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:11:32,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:11:32,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:11:30" (1/3) ... [2024-11-28 05:11:32,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf3067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:32, skipping insertion in model container [2024-11-28 05:11:32,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:30" (2/3) ... [2024-11-28 05:11:32,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf3067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:32, skipping insertion in model container [2024-11-28 05:11:32,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:32" (3/3) ... [2024-11-28 05:11:32,561 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-11-28 05:11:32,581 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:11:32,582 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-min.wvr.c that has 4 procedures, 81 locations, 1 initial locations, 6 loop locations, and 34 error locations. [2024-11-28 05:11:32,583 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:11:32,752 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 05:11:32,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-28 05:11:32,884 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-28 05:11:32,889 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:11:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 247 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-28 05:11:32,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-28 05:11:32,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-28 05:11:32,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:11:32,938 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;@6e5ffc0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:11:32,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-28 05:11:32,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:11:32,943 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:11:32,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:11:32,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:32,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:11:32,946 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:32,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash 909488, now seen corresponding path program 1 times [2024-11-28 05:11:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205055994] [2024-11-28 05:11:32,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:33,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205055994] [2024-11-28 05:11:33,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205055994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:33,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:11:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011053227] [2024-11-28 05:11:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:33,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:11:33,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:33,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:11:33,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:11:33,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:33,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:33,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:33,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:33,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:34,724 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-28 05:11:34,725 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-28 05:11:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29707 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-11-28 05:11:34,789 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-28 05:11:34,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-28 05:11:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:11:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:11:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-28 05:11:34,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-28 05:11:34,811 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-28 05:11:34,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-28 05:11:34,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:11:34,834 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-28 05:11:34,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-28 05:11:34,844 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-28 05:11:34,845 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-28 05:11:34,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:34,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:34,846 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:11:34,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:11:34,847 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:34,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash 909489, now seen corresponding path program 1 times [2024-11-28 05:11:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:34,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071157237] [2024-11-28 05:11:34,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:34,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:35,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071157237] [2024-11-28 05:11:35,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071157237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:35,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:35,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:11:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363384836] [2024-11-28 05:11:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:35,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:11:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:35,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:11:35,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:11:35,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:35,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:35,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:35,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:35,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:36,352 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-28 05:11:36,352 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-28 05:11:36,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29713 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-11-28 05:11:36,390 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-28 05:11:36,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-28 05:11:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:11:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:11:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-28 05:11:36,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-28 05:11:36,394 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-28 05:11:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-28 05:11:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:11:36,398 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-28 05:11:36,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-11-28 05:11:36,400 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-28 05:11:36,400 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-28 05:11:36,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:36,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:36,402 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:11:36,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:11:36,403 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:36,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash 874048142, now seen corresponding path program 1 times [2024-11-28 05:11:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:36,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230700659] [2024-11-28 05:11:36,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:36,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:36,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230700659] [2024-11-28 05:11:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230700659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39285731] [2024-11-28 05:11:36,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:36,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:36,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:36,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:11:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:36,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:11:36,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:37,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 05:11:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:37,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39285731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:37,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:37,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 05:11:37,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032429626] [2024-11-28 05:11:37,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:37,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:11:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:37,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:11:37,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:11:38,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:38,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:38,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:38,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:39,650 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-28 05:11:39,650 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-28 05:11:39,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29703 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-11-28 05:11:39,698 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-28 05:11:39,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-28 05:11:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:11:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:11:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-28 05:11:39,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-28 05:11:39,701 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-28 05:11:39,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-28 05:11:39,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:11:39,706 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-28 05:11:39,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-28 05:11:39,707 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-28 05:11:39,708 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-28 05:11:39,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:39,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:39,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:11:39,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:11:39,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:39,911 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:39,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1325691451, now seen corresponding path program 1 times [2024-11-28 05:11:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:39,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649218074] [2024-11-28 05:11:39,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:39,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:40,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649218074] [2024-11-28 05:11:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649218074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:40,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882448932] [2024-11-28 05:11:40,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:40,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:40,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:40,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:11:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:40,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:11:40,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:40,411 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 [2024-11-28 05:11:40,586 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:11:40,586 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 32 treesize of output 27 [2024-11-28 05:11:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:40,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882448932] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:40,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:11:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-28 05:11:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026426921] [2024-11-28 05:11:40,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:40,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:11:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:40,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:11:40,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:11:40,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:40,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:40,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:40,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:40,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:41,585 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-28 05:11:41,585 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-28 05:11:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29756 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-11-28 05:11:41,625 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-28 05:11:41,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-28 05:11:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:11:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:11:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-28 05:11:41,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-28 05:11:41,630 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-28 05:11:41,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-28 05:11:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 05:11:41,635 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-28 05:11:41,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-28 05:11:41,639 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-28 05:11:41,639 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-28 05:11:41,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:41,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:41,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:41,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:11:41,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:41,840 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:41,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1853236567, now seen corresponding path program 1 times [2024-11-28 05:11:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:41,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354209039] [2024-11-28 05:11:41,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:11:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354209039] [2024-11-28 05:11:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354209039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:11:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289805097] [2024-11-28 05:11:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:41,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:11:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:41,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:11:41,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:11:42,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:11:42,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 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) [2024-11-28 05:11:42,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:42,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:11:42,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:42,672 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-28 05:11:42,672 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 05:11:42,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29804 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-11-28 05:11:42,707 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-28 05:11:42,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-28 05:11:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:11:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:11:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-28 05:11:42,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-28 05:11:42,710 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-28 05:11:42,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-28 05:11:42,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:11:42,716 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-28 05:11:42,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-28 05:11:42,717 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-28 05:11:42,719 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-28 05:11:42,719 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) [2024-11-28 05:11:42,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:42,719 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:42,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:11:42,720 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:42,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772427, now seen corresponding path program 1 times [2024-11-28 05:11:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672188645] [2024-11-28 05:11:42,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:42,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:42,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672188645] [2024-11-28 05:11:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672188645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818300328] [2024-11-28 05:11:42,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:42,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:42,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:11:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:43,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:11:43,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:43,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818300328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:43,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 05:11:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253422145] [2024-11-28 05:11:43,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:43,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:11:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:43,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:11:43,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:11:43,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:11:43,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:43,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:43,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:11:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:45,067 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-28 05:11:45,067 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-28 05:11:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63286 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-11-28 05:11:45,133 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-28 05:11:45,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-28 05:11:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:11:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:11:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-28 05:11:45,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-28 05:11:45,139 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-28 05:11:45,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-28 05:11:45,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:11:45,146 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-28 05:11:45,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-28 05:11:45,149 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-28 05:11:45,149 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-28 05:11:45,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:45,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:45,150 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-28 05:11:45,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:11:45,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:11:45,351 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:45,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash 256040248, now seen corresponding path program 2 times [2024-11-28 05:11:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42592581] [2024-11-28 05:11:45,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:45,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:45,397 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42592581] [2024-11-28 05:11:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42592581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711486283] [2024-11-28 05:11:45,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:45,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:45,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:45,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:11:45,826 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:45,826 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:45,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:11:45,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:45,847 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 [2024-11-28 05:11:46,043 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:11:46,043 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 32 treesize of output 27 [2024-11-28 05:11:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:46,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:11:46,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711486283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:46,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:46,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-28 05:11:46,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978446716] [2024-11-28 05:11:46,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:46,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:11:46,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:46,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:11:46,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:11:48,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:48,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:48,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:48,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:48,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:51,548 INFO L124 PetriNetUnfolderBase]: 8876/13921 cut-off events. [2024-11-28 05:11:51,548 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-28 05:11:51,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26017 conditions, 13921 events. 8876/13921 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 103165 event pairs, 6402 based on Foata normal form. 10/9783 useless extension candidates. Maximal degree in co-relation 17295. Up to 7776 conditions per place. [2024-11-28 05:11:51,639 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 96 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-11-28 05:11:51,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 923 flow [2024-11-28 05:11:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:11:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:11:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 660 transitions. [2024-11-28 05:11:51,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4943820224719101 [2024-11-28 05:11:51,643 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 15 states and 660 transitions. [2024-11-28 05:11:51,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 923 flow [2024-11-28 05:11:51,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 885 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-28 05:11:51,648 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 640 flow [2024-11-28 05:11:51,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=640, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-11-28 05:11:51,649 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 22 predicate places. [2024-11-28 05:11:51,650 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 640 flow [2024-11-28 05:11:51,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:51,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:51,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:11:51,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:11:51,855 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:51,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525134, now seen corresponding path program 1 times [2024-11-28 05:11:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120044415] [2024-11-28 05:11:51,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:11:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120044415] [2024-11-28 05:11:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120044415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:11:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:11:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:11:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511172375] [2024-11-28 05:11:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:52,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:11:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:52,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:11:52,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:11:52,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-28 05:11:52,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 640 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:52,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:52,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-28 05:11:52,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:54,283 INFO L124 PetriNetUnfolderBase]: 8975/14419 cut-off events. [2024-11-28 05:11:54,283 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-11-28 05:11:54,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 14419 events. 8975/14419 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 105986 event pairs, 6564 based on Foata normal form. 0/10261 useless extension candidates. Maximal degree in co-relation 26700. Up to 11812 conditions per place. [2024-11-28 05:11:54,424 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 80 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-11-28 05:11:54,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 812 flow [2024-11-28 05:11:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:11:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:11:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-28 05:11:54,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-28 05:11:54,426 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 640 flow. Second operand 5 states and 194 transitions. [2024-11-28 05:11:54,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 812 flow [2024-11-28 05:11:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 761 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-28 05:11:54,434 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 601 flow [2024-11-28 05:11:54,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-11-28 05:11:54,435 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-28 05:11:54,436 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 601 flow [2024-11-28 05:11:54,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:54,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:54,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:54,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:11:54,437 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:11:54,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525133, now seen corresponding path program 1 times [2024-11-28 05:11:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:54,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336107390] [2024-11-28 05:11:54,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:11:55,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336107390] [2024-11-28 05:11:55,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336107390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528530783] [2024-11-28 05:11:55,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:11:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:55,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:55,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:11:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:55,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:11:55,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:55,177 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 [2024-11-28 05:11:55,185 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 [2024-11-28 05:11:55,261 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:11:55,262 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 [2024-11-28 05:11:55,279 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 18 treesize of output 13 [2024-11-28 05:11:55,455 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-28 05:11:55,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-28 05:11:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:11:55,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:11:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528530783] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:56,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:11:56,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-28 05:11:56,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441893780] [2024-11-28 05:11:56,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:11:56,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:11:56,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:56,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:11:56,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:11:56,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:11:56,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:11:56,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:56,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:11:56,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:01,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:12:04,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:12:07,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:12:08,558 INFO L124 PetriNetUnfolderBase]: 7997/12541 cut-off events. [2024-11-28 05:12:08,558 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-11-28 05:12:08,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23545 conditions, 12541 events. 7997/12541 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 90440 event pairs, 5736 based on Foata normal form. 0/8926 useless extension candidates. Maximal degree in co-relation 23471. Up to 10504 conditions per place. [2024-11-28 05:12:08,631 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 77 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-11-28 05:12:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 787 flow [2024-11-28 05:12:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:12:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:12:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-28 05:12:08,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2024-11-28 05:12:08,634 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 601 flow. Second operand 6 states and 256 transitions. [2024-11-28 05:12:08,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 787 flow [2024-11-28 05:12:08,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 772 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:12:08,640 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 610 flow [2024-11-28 05:12:08,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-11-28 05:12:08,641 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-28 05:12:08,641 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 610 flow [2024-11-28 05:12:08,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:08,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:08,641 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:08,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:12:08,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:08,842 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:08,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 762296661, now seen corresponding path program 1 times [2024-11-28 05:12:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353149691] [2024-11-28 05:12:08,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:12:08,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:08,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353149691] [2024-11-28 05:12:08,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353149691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:08,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:08,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:12:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321757572] [2024-11-28 05:12:08,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:08,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:12:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:08,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:12:08,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:12:09,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-28 05:12:09,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:09,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:09,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-28 05:12:09,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:10,204 INFO L124 PetriNetUnfolderBase]: 8132/12709 cut-off events. [2024-11-28 05:12:10,205 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-28 05:12:10,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23981 conditions, 12709 events. 8132/12709 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 88750 event pairs, 5934 based on Foata normal form. 0/9292 useless extension candidates. Maximal degree in co-relation 23907. Up to 10756 conditions per place. [2024-11-28 05:12:10,423 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-11-28 05:12:10,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 778 flow [2024-11-28 05:12:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:12:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:12:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-28 05:12:10,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-28 05:12:10,426 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 610 flow. Second operand 5 states and 197 transitions. [2024-11-28 05:12:10,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 778 flow [2024-11-28 05:12:10,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 763 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:12:10,432 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 611 flow [2024-11-28 05:12:10,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=611, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-11-28 05:12:10,433 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-28 05:12:10,433 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 611 flow [2024-11-28 05:12:10,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:10,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:10,434 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:10,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:12:10,434 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:10,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:10,435 INFO L85 PathProgramCache]: Analyzing trace with hash 762296662, now seen corresponding path program 1 times [2024-11-28 05:12:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:10,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938528591] [2024-11-28 05:12:10,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938528591] [2024-11-28 05:12:10,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938528591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652668922] [2024-11-28 05:12:10,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:10,824 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:10,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:12:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:10,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:12:10,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:10,969 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 [2024-11-28 05:12:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:12:11,059 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 16 treesize of output 11 [2024-11-28 05:12:11,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:12:11,077 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 [2024-11-28 05:12:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:11,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:11,266 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 52 treesize of output 48 [2024-11-28 05:12:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652668922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:11,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:11,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 05:12:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024570088] [2024-11-28 05:12:11,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:11,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:12:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:11,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:12:11,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:12:12,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-28 05:12:12,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 611 flow. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:12,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:12,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-28 05:12:12,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:13,755 INFO L124 PetriNetUnfolderBase]: 7118/11161 cut-off events. [2024-11-28 05:12:13,755 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-28 05:12:13,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21011 conditions, 11161 events. 7118/11161 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 78722 event pairs, 5070 based on Foata normal form. 0/8092 useless extension candidates. Maximal degree in co-relation 20937. Up to 9352 conditions per place. [2024-11-28 05:12:13,824 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 67 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-11-28 05:12:13,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 803 flow [2024-11-28 05:12:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:12:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-28 05:12:13,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-28 05:12:13,827 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 611 flow. Second operand 8 states and 310 transitions. [2024-11-28 05:12:13,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 803 flow [2024-11-28 05:12:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:12:13,832 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 634 flow [2024-11-28 05:12:13,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-11-28 05:12:13,835 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2024-11-28 05:12:13,835 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 634 flow [2024-11-28 05:12:13,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:13,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:13,835 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2024-11-28 05:12:13,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:12:14,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,036 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:14,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash -357129355, now seen corresponding path program 3 times [2024-11-28 05:12:14,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:14,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741749023] [2024-11-28 05:12:14,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:14,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:14,069 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:12:14,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:14,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741749023] [2024-11-28 05:12:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741749023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934601686] [2024-11-28 05:12:14,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:14,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:14,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:12:14,589 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:12:14,589 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:14,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:12:14,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:14,683 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 [2024-11-28 05:12:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:12:14,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:12:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934601686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:15,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-28 05:12:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424308898] [2024-11-28 05:12:15,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:15,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:12:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:15,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:12:15,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:12:16,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:12:16,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 634 flow. Second operand has 15 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:16,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:16,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:12:16,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:18,206 INFO L124 PetriNetUnfolderBase]: 7118/11157 cut-off events. [2024-11-28 05:12:18,207 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-28 05:12:18,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21004 conditions, 11157 events. 7118/11157 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 78737 event pairs, 5070 based on Foata normal form. 4/8092 useless extension candidates. Maximal degree in co-relation 20954. Up to 9352 conditions per place. [2024-11-28 05:12:18,271 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 37 selfloop transitions, 53 changer transitions 0/105 dead transitions. [2024-11-28 05:12:18,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 806 flow [2024-11-28 05:12:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:12:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:12:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 292 transitions. [2024-11-28 05:12:18,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46869983948635635 [2024-11-28 05:12:18,274 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 634 flow. Second operand 7 states and 292 transitions. [2024-11-28 05:12:18,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 806 flow [2024-11-28 05:12:18,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 749 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-28 05:12:18,281 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 675 flow [2024-11-28 05:12:18,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2024-11-28 05:12:18,284 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 12 predicate places. [2024-11-28 05:12:18,286 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 675 flow [2024-11-28 05:12:18,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:18,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:18,286 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:18,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:12:18,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:18,487 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:18,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1062165093, now seen corresponding path program 1 times [2024-11-28 05:12:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:18,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400904000] [2024-11-28 05:12:18,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400904000] [2024-11-28 05:12:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400904000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544525520] [2024-11-28 05:12:18,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:18,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:18,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:18,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:12:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:18,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:12:18,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:18,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:18,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544525520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:18,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:18,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 05:12:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214642605] [2024-11-28 05:12:18,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:18,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:12:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:18,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:12:18,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:12:19,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 675 flow. Second operand has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:20,231 INFO L124 PetriNetUnfolderBase]: 4452/7131 cut-off events. [2024-11-28 05:12:20,231 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-28 05:12:20,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13621 conditions, 7131 events. 4452/7131 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 46632 event pairs, 2874 based on Foata normal form. 0/5174 useless extension candidates. Maximal degree in co-relation 13400. Up to 3523 conditions per place. [2024-11-28 05:12:20,270 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 95 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-28 05:12:20,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1057 flow [2024-11-28 05:12:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:12:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 440 transitions. [2024-11-28 05:12:20,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5493133583021224 [2024-11-28 05:12:20,273 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 675 flow. Second operand 9 states and 440 transitions. [2024-11-28 05:12:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1057 flow [2024-11-28 05:12:20,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1044 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 05:12:20,279 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 767 flow [2024-11-28 05:12:20,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-11-28 05:12:20,280 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 21 predicate places. [2024-11-28 05:12:20,280 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 767 flow [2024-11-28 05:12:20,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:20,281 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:20,281 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:20,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:20,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:20,482 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:20,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1387189167, now seen corresponding path program 1 times [2024-11-28 05:12:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554567171] [2024-11-28 05:12:20,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:20,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554567171] [2024-11-28 05:12:20,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554567171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:20,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949452926] [2024-11-28 05:12:20,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:20,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:20,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:12:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:20,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:12:20,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:20,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949452926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:21,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:21,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 05:12:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779086547] [2024-11-28 05:12:21,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:21,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:12:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:21,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:12:21,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:12:21,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:21,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 767 flow. Second operand has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:21,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:21,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:21,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:21,933 INFO L124 PetriNetUnfolderBase]: 3253/5228 cut-off events. [2024-11-28 05:12:21,933 INFO L125 PetriNetUnfolderBase]: For 940/1066 co-relation queries the response was YES. [2024-11-28 05:12:21,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10700 conditions, 5228 events. 3253/5228 cut-off events. For 940/1066 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31043 event pairs, 2212 based on Foata normal form. 0/3914 useless extension candidates. Maximal degree in co-relation 10457. Up to 3518 conditions per place. [2024-11-28 05:12:21,956 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 82 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-11-28 05:12:21,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1101 flow [2024-11-28 05:12:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:12:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2024-11-28 05:12:21,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.533083645443196 [2024-11-28 05:12:21,959 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 767 flow. Second operand 9 states and 427 transitions. [2024-11-28 05:12:21,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1101 flow [2024-11-28 05:12:21,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 140 transitions, 1020 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:12:21,967 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 791 flow [2024-11-28 05:12:21,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=791, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-11-28 05:12:21,968 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-11-28 05:12:21,968 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 791 flow [2024-11-28 05:12:21,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:21,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:21,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:21,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:12:22,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:22,173 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:22,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash 511246116, now seen corresponding path program 1 times [2024-11-28 05:12:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:22,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020052211] [2024-11-28 05:12:22,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:22,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020052211] [2024-11-28 05:12:22,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020052211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:22,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:12:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362820512] [2024-11-28 05:12:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:22,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:12:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:22,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:12:22,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:12:22,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:12:22,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:22,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:22,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:12:22,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:22,918 INFO L124 PetriNetUnfolderBase]: 2451/3882 cut-off events. [2024-11-28 05:12:22,919 INFO L125 PetriNetUnfolderBase]: For 1347/1433 co-relation queries the response was YES. [2024-11-28 05:12:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 3882 events. 2451/3882 cut-off events. For 1347/1433 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21951 event pairs, 1866 based on Foata normal form. 0/3093 useless extension candidates. Maximal degree in co-relation 8586. Up to 3352 conditions per place. [2024-11-28 05:12:22,940 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 84 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-28 05:12:22,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 971 flow [2024-11-28 05:12:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:12:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:12:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-28 05:12:22,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-28 05:12:22,941 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 791 flow. Second operand 4 states and 182 transitions. [2024-11-28 05:12:22,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 971 flow [2024-11-28 05:12:22,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 890 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:12:22,947 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 722 flow [2024-11-28 05:12:22,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=722, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-28 05:12:22,948 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2024-11-28 05:12:22,948 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 722 flow [2024-11-28 05:12:22,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:22,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:22,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:22,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 05:12:22,949 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:22,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 511246117, now seen corresponding path program 1 times [2024-11-28 05:12:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149258884] [2024-11-28 05:12:22,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:23,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149258884] [2024-11-28 05:12:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149258884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:23,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627190240] [2024-11-28 05:12:23,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:23,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:23,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:12:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:23,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:12:23,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:23,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:12:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627190240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:23,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 05:12:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551939381] [2024-11-28 05:12:23,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:23,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:12:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:23,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:12:23,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:12:23,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 722 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:23,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:23,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:23,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:24,251 INFO L124 PetriNetUnfolderBase]: 2335/3663 cut-off events. [2024-11-28 05:12:24,252 INFO L125 PetriNetUnfolderBase]: For 1081/1262 co-relation queries the response was YES. [2024-11-28 05:12:24,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8108 conditions, 3663 events. 2335/3663 cut-off events. For 1081/1262 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20399 event pairs, 1329 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 7883. Up to 2356 conditions per place. [2024-11-28 05:12:24,270 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 90 selfloop transitions, 44 changer transitions 0/148 dead transitions. [2024-11-28 05:12:24,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1106 flow [2024-11-28 05:12:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:12:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:12:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 471 transitions. [2024-11-28 05:12:24,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2024-11-28 05:12:24,273 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 722 flow. Second operand 10 states and 471 transitions. [2024-11-28 05:12:24,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1106 flow [2024-11-28 05:12:24,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1097 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:12:24,280 INFO L231 Difference]: Finished difference. Result has 116 places, 109 transitions, 847 flow [2024-11-28 05:12:24,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=116, PETRI_TRANSITIONS=109} [2024-11-28 05:12:24,281 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2024-11-28 05:12:24,281 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 109 transitions, 847 flow [2024-11-28 05:12:24,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:24,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:24,282 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:24,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:24,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:12:24,483 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:24,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1186557003, now seen corresponding path program 2 times [2024-11-28 05:12:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:24,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401067178] [2024-11-28 05:12:24,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:24,515 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:12:24,515 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:12:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401067178] [2024-11-28 05:12:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401067178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:24,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:24,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:12:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480625595] [2024-11-28 05:12:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:24,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:24,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:24,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:12:25,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 89 [2024-11-28 05:12:25,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 109 transitions, 847 flow. Second operand has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:25,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:25,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 89 [2024-11-28 05:12:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:26,553 INFO L124 PetriNetUnfolderBase]: 4946/7807 cut-off events. [2024-11-28 05:12:26,553 INFO L125 PetriNetUnfolderBase]: For 1859/2093 co-relation queries the response was YES. [2024-11-28 05:12:26,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17566 conditions, 7807 events. 4946/7807 cut-off events. For 1859/2093 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 49123 event pairs, 2354 based on Foata normal form. 0/5702 useless extension candidates. Maximal degree in co-relation 17302. Up to 4215 conditions per place. [2024-11-28 05:12:26,632 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 136 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2024-11-28 05:12:26,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 157 transitions, 1277 flow [2024-11-28 05:12:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:12:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:12:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 305 transitions. [2024-11-28 05:12:26,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895666131621188 [2024-11-28 05:12:26,635 INFO L175 Difference]: Start difference. First operand has 116 places, 109 transitions, 847 flow. Second operand 7 states and 305 transitions. [2024-11-28 05:12:26,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 157 transitions, 1277 flow [2024-11-28 05:12:26,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1226 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 05:12:26,646 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 845 flow [2024-11-28 05:12:26,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2024-11-28 05:12:26,647 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 33 predicate places. [2024-11-28 05:12:26,647 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 845 flow [2024-11-28 05:12:26,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:26,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:26,648 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:26,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:12:26,648 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:26,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647945, now seen corresponding path program 2 times [2024-11-28 05:12:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:26,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746803730] [2024-11-28 05:12:26,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:26,683 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:12:26,683 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:12:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746803730] [2024-11-28 05:12:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746803730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:27,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:12:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082898213] [2024-11-28 05:12:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:27,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:12:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:27,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:12:27,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:12:27,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 89 [2024-11-28 05:12:27,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 845 flow. Second operand has 9 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:27,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:27,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 89 [2024-11-28 05:12:27,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:29,505 INFO L124 PetriNetUnfolderBase]: 7661/11075 cut-off events. [2024-11-28 05:12:29,505 INFO L125 PetriNetUnfolderBase]: For 4664/5156 co-relation queries the response was YES. [2024-11-28 05:12:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26649 conditions, 11075 events. 7661/11075 cut-off events. For 4664/5156 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 62426 event pairs, 3316 based on Foata normal form. 172/8424 useless extension candidates. Maximal degree in co-relation 26394. Up to 6302 conditions per place. [2024-11-28 05:12:29,599 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 133 selfloop transitions, 18 changer transitions 0/164 dead transitions. [2024-11-28 05:12:29,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 164 transitions, 1327 flow [2024-11-28 05:12:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:12:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 292 transitions. [2024-11-28 05:12:29,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4101123595505618 [2024-11-28 05:12:29,602 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 845 flow. Second operand 8 states and 292 transitions. [2024-11-28 05:12:29,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 164 transitions, 1327 flow [2024-11-28 05:12:29,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 164 transitions, 1296 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:12:29,619 INFO L231 Difference]: Finished difference. Result has 124 places, 115 transitions, 887 flow [2024-11-28 05:12:29,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2024-11-28 05:12:29,621 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2024-11-28 05:12:29,622 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 887 flow [2024-11-28 05:12:29,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:29,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:29,622 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:29,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:12:29,623 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:29,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647947, now seen corresponding path program 1 times [2024-11-28 05:12:29,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559152822] [2024-11-28 05:12:29,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:12:30,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:30,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559152822] [2024-11-28 05:12:30,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559152822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:30,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214755707] [2024-11-28 05:12:30,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:30,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:30,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:30,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:30,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:12:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:30,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:12:30,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:30,334 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 [2024-11-28 05:12:30,343 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 [2024-11-28 05:12:30,448 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:12:30,448 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 [2024-11-28 05:12:30,492 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 31 treesize of output 24 [2024-11-28 05:12:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:12:31,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:12:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:31,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214755707] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:31,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:31,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-28 05:12:31,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059623606] [2024-11-28 05:12:31,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:31,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:31,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:31,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:12:32,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:12:32,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:32,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:32,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:12:32,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:33,706 INFO L124 PetriNetUnfolderBase]: 5250/7934 cut-off events. [2024-11-28 05:12:33,706 INFO L125 PetriNetUnfolderBase]: For 5426/6434 co-relation queries the response was YES. [2024-11-28 05:12:33,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20431 conditions, 7934 events. 5250/7934 cut-off events. For 5426/6434 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47367 event pairs, 1921 based on Foata normal form. 285/6647 useless extension candidates. Maximal degree in co-relation 20170. Up to 3342 conditions per place. [2024-11-28 05:12:33,786 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 108 selfloop transitions, 25 changer transitions 0/150 dead transitions. [2024-11-28 05:12:33,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 150 transitions, 1252 flow [2024-11-28 05:12:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:12:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 423 transitions. [2024-11-28 05:12:33,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5280898876404494 [2024-11-28 05:12:33,788 INFO L175 Difference]: Start difference. First operand has 124 places, 115 transitions, 887 flow. Second operand 9 states and 423 transitions. [2024-11-28 05:12:33,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 150 transitions, 1252 flow [2024-11-28 05:12:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1217 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 05:12:33,819 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 936 flow [2024-11-28 05:12:33,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=936, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2024-11-28 05:12:33,820 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 44 predicate places. [2024-11-28 05:12:33,820 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 936 flow [2024-11-28 05:12:33,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:33,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:33,820 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:33,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:34,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:34,021 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:34,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2114918215, now seen corresponding path program 1 times [2024-11-28 05:12:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546810659] [2024-11-28 05:12:34,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:12:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546810659] [2024-11-28 05:12:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546810659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316271673] [2024-11-28 05:12:34,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:34,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:34,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:34,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:12:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:34,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:12:34,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:34,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 05:12:34,818 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-28 05:12:34,818 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 16 treesize of output 18 [2024-11-28 05:12:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:12:35,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:35,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316271673] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:35,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:12:35,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-28 05:12:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723174920] [2024-11-28 05:12:35,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:35,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:12:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:35,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:12:35,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:12:36,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:12:36,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:36,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:36,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:12:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:37,701 INFO L124 PetriNetUnfolderBase]: 6231/9100 cut-off events. [2024-11-28 05:12:37,701 INFO L125 PetriNetUnfolderBase]: For 10432/11303 co-relation queries the response was YES. [2024-11-28 05:12:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 9100 events. 6231/9100 cut-off events. For 10432/11303 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 53497 event pairs, 2024 based on Foata normal form. 393/7928 useless extension candidates. Maximal degree in co-relation 25970. Up to 4718 conditions per place. [2024-11-28 05:12:37,787 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 116 selfloop transitions, 24 changer transitions 0/154 dead transitions. [2024-11-28 05:12:37,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 154 transitions, 1347 flow [2024-11-28 05:12:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:12:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:12:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 400 transitions. [2024-11-28 05:12:37,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4993757802746567 [2024-11-28 05:12:37,789 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 936 flow. Second operand 9 states and 400 transitions. [2024-11-28 05:12:37,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 154 transitions, 1347 flow [2024-11-28 05:12:37,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 1310 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 05:12:37,817 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 964 flow [2024-11-28 05:12:37,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2024-11-28 05:12:37,818 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2024-11-28 05:12:37,818 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 964 flow [2024-11-28 05:12:37,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:37,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:37,819 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:37,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:12:38,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:38,019 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:38,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647949, now seen corresponding path program 1 times [2024-11-28 05:12:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:38,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936178376] [2024-11-28 05:12:38,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:12:38,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936178376] [2024-11-28 05:12:38,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936178376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211980306] [2024-11-28 05:12:38,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:38,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:38,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:38,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:12:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:38,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:12:38,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:38,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:38,934 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 [2024-11-28 05:12:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:38,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211980306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:38,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:38,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-28 05:12:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736108165] [2024-11-28 05:12:38,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:39,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:12:39,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:39,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:12:39,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:12:40,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:40,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 964 flow. Second operand has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:40,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:40,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:40,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:42,504 INFO L124 PetriNetUnfolderBase]: 5515/8072 cut-off events. [2024-11-28 05:12:42,505 INFO L125 PetriNetUnfolderBase]: For 8752/9092 co-relation queries the response was YES. [2024-11-28 05:12:42,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23635 conditions, 8072 events. 5515/8072 cut-off events. For 8752/9092 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 46130 event pairs, 2613 based on Foata normal form. 348/6938 useless extension candidates. Maximal degree in co-relation 23362. Up to 4536 conditions per place. [2024-11-28 05:12:42,577 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 120 selfloop transitions, 31 changer transitions 12/178 dead transitions. [2024-11-28 05:12:42,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 178 transitions, 1523 flow [2024-11-28 05:12:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:12:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:12:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 593 transitions. [2024-11-28 05:12:42,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125324114088159 [2024-11-28 05:12:42,580 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 964 flow. Second operand 13 states and 593 transitions. [2024-11-28 05:12:42,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 178 transitions, 1523 flow [2024-11-28 05:12:42,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 178 transitions, 1466 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-28 05:12:42,602 INFO L231 Difference]: Finished difference. Result has 140 places, 114 transitions, 941 flow [2024-11-28 05:12:42,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=941, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2024-11-28 05:12:42,603 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 54 predicate places. [2024-11-28 05:12:42,603 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 941 flow [2024-11-28 05:12:42,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:42,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:42,603 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:42,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:42,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:42,804 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:42,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1361678330, now seen corresponding path program 1 times [2024-11-28 05:12:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:42,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201779180] [2024-11-28 05:12:42,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201779180] [2024-11-28 05:12:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201779180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286808461] [2024-11-28 05:12:42,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:42,994 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:42,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:12:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:43,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:12:43,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:43,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286808461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:43,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 05:12:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625843311] [2024-11-28 05:12:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:43,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:12:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:43,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:12:43,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:12:43,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:43,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 941 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:43,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:43,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:43,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:45,501 INFO L124 PetriNetUnfolderBase]: 8262/12153 cut-off events. [2024-11-28 05:12:45,502 INFO L125 PetriNetUnfolderBase]: For 17898/18500 co-relation queries the response was YES. [2024-11-28 05:12:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36049 conditions, 12153 events. 8262/12153 cut-off events. For 17898/18500 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 73053 event pairs, 4702 based on Foata normal form. 228/10629 useless extension candidates. Maximal degree in co-relation 22770. Up to 7043 conditions per place. [2024-11-28 05:12:45,614 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 136 selfloop transitions, 55 changer transitions 0/206 dead transitions. [2024-11-28 05:12:45,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 206 transitions, 1804 flow [2024-11-28 05:12:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:12:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:12:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 699 transitions. [2024-11-28 05:12:45,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5235955056179775 [2024-11-28 05:12:45,616 INFO L175 Difference]: Start difference. First operand has 140 places, 114 transitions, 941 flow. Second operand 15 states and 699 transitions. [2024-11-28 05:12:45,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 206 transitions, 1804 flow [2024-11-28 05:12:45,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 1740 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-28 05:12:45,653 INFO L231 Difference]: Finished difference. Result has 150 places, 127 transitions, 1205 flow [2024-11-28 05:12:45,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1205, PETRI_PLACES=150, PETRI_TRANSITIONS=127} [2024-11-28 05:12:45,654 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 64 predicate places. [2024-11-28 05:12:45,654 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 127 transitions, 1205 flow [2024-11-28 05:12:45,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:45,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:45,655 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:45,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:12:45,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:45,855 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:45,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash -37326401, now seen corresponding path program 2 times [2024-11-28 05:12:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402311502] [2024-11-28 05:12:45,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:45,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:45,881 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:45,881 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:12:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402311502] [2024-11-28 05:12:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402311502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:12:46,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763781610] [2024-11-28 05:12:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:46,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:12:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:46,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:12:46,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:12:46,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-28 05:12:46,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 127 transitions, 1205 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:46,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:46,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-28 05:12:46,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:47,883 INFO L124 PetriNetUnfolderBase]: 8406/12260 cut-off events. [2024-11-28 05:12:47,883 INFO L125 PetriNetUnfolderBase]: For 16663/17665 co-relation queries the response was YES. [2024-11-28 05:12:47,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36207 conditions, 12260 events. 8406/12260 cut-off events. For 16663/17665 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70224 event pairs, 1252 based on Foata normal form. 916/11636 useless extension candidates. Maximal degree in co-relation 23564. Up to 8731 conditions per place. [2024-11-28 05:12:47,978 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 187 selfloop transitions, 9 changer transitions 0/210 dead transitions. [2024-11-28 05:12:47,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 210 transitions, 1994 flow [2024-11-28 05:12:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:12:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:12:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 322 transitions. [2024-11-28 05:12:47,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.602996254681648 [2024-11-28 05:12:47,980 INFO L175 Difference]: Start difference. First operand has 150 places, 127 transitions, 1205 flow. Second operand 6 states and 322 transitions. [2024-11-28 05:12:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 210 transitions, 1994 flow [2024-11-28 05:12:48,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 210 transitions, 1965 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-28 05:12:48,007 INFO L231 Difference]: Finished difference. Result has 158 places, 133 transitions, 1238 flow [2024-11-28 05:12:48,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1238, PETRI_PLACES=158, PETRI_TRANSITIONS=133} [2024-11-28 05:12:48,008 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-28 05:12:48,008 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 133 transitions, 1238 flow [2024-11-28 05:12:48,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:48,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:48,008 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:48,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 05:12:48,009 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:48,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash -619839489, now seen corresponding path program 1 times [2024-11-28 05:12:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184414273] [2024-11-28 05:12:48,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:48,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184414273] [2024-11-28 05:12:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184414273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074496586] [2024-11-28 05:12:48,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:48,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:48,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:48,194 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:48,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:12:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:48,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:12:48,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:48,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:12:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074496586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:48,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:48,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 05:12:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756764831] [2024-11-28 05:12:48,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:48,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:12:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:48,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:12:48,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:12:48,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:48,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 133 transitions, 1238 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:48,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:48,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:48,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:50,395 INFO L124 PetriNetUnfolderBase]: 6086/9897 cut-off events. [2024-11-28 05:12:50,395 INFO L125 PetriNetUnfolderBase]: For 15911/16680 co-relation queries the response was YES. [2024-11-28 05:12:50,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30582 conditions, 9897 events. 6086/9897 cut-off events. For 15911/16680 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 63885 event pairs, 3592 based on Foata normal form. 322/8972 useless extension candidates. Maximal degree in co-relation 21932. Up to 6041 conditions per place. [2024-11-28 05:12:50,486 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 134 selfloop transitions, 56 changer transitions 0/208 dead transitions. [2024-11-28 05:12:50,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 208 transitions, 1991 flow [2024-11-28 05:12:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:12:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:12:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 691 transitions. [2024-11-28 05:12:50,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5176029962546816 [2024-11-28 05:12:50,489 INFO L175 Difference]: Start difference. First operand has 158 places, 133 transitions, 1238 flow. Second operand 15 states and 691 transitions. [2024-11-28 05:12:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 208 transitions, 1991 flow [2024-11-28 05:12:50,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 208 transitions, 1983 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-28 05:12:50,528 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1406 flow [2024-11-28 05:12:50,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1406, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2024-11-28 05:12:50,529 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 89 predicate places. [2024-11-28 05:12:50,529 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1406 flow [2024-11-28 05:12:50,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:50,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:50,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:50,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:12:50,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:50,730 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:50,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash -222388927, now seen corresponding path program 1 times [2024-11-28 05:12:50,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:50,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114766022] [2024-11-28 05:12:50,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:12:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114766022] [2024-11-28 05:12:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114766022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:12:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285270271] [2024-11-28 05:12:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:50,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:12:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:50,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:12:50,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:12:51,087 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-28 05:12:51,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:51,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:51,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-28 05:12:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:53,949 INFO L124 PetriNetUnfolderBase]: 9654/15226 cut-off events. [2024-11-28 05:12:53,949 INFO L125 PetriNetUnfolderBase]: For 28471/30034 co-relation queries the response was YES. [2024-11-28 05:12:54,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48541 conditions, 15226 events. 9654/15226 cut-off events. For 28471/30034 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 103096 event pairs, 1054 based on Foata normal form. 787/14014 useless extension candidates. Maximal degree in co-relation 34919. Up to 7025 conditions per place. [2024-11-28 05:12:54,141 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 172 selfloop transitions, 17 changer transitions 17/225 dead transitions. [2024-11-28 05:12:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 225 transitions, 2314 flow [2024-11-28 05:12:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:12:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:12:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 364 transitions. [2024-11-28 05:12:54,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-28 05:12:54,143 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1406 flow. Second operand 7 states and 364 transitions. [2024-11-28 05:12:54,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 225 transitions, 2314 flow [2024-11-28 05:12:54,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 225 transitions, 2212 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-28 05:12:54,231 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1279 flow [2024-11-28 05:12:54,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1279, PETRI_PLACES=172, PETRI_TRANSITIONS=135} [2024-11-28 05:12:54,232 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 86 predicate places. [2024-11-28 05:12:54,232 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1279 flow [2024-11-28 05:12:54,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:54,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:54,233 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:54,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 05:12:54,233 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:54,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1445200004, now seen corresponding path program 1 times [2024-11-28 05:12:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391984934] [2024-11-28 05:12:54,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:12:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:12:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:54,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391984934] [2024-11-28 05:12:54,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391984934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:54,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:12:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171387080] [2024-11-28 05:12:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:54,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:12:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:54,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:12:54,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:12:54,568 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:12:54,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 135 transitions, 1279 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:54,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:54,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:12:54,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:58,159 INFO L124 PetriNetUnfolderBase]: 14599/23350 cut-off events. [2024-11-28 05:12:58,159 INFO L125 PetriNetUnfolderBase]: For 45816/47750 co-relation queries the response was YES. [2024-11-28 05:12:58,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78778 conditions, 23350 events. 14599/23350 cut-off events. For 45816/47750 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 177093 event pairs, 4209 based on Foata normal form. 1037/21984 useless extension candidates. Maximal degree in co-relation 58196. Up to 10652 conditions per place. [2024-11-28 05:12:58,452 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 211 selfloop transitions, 27 changer transitions 0/258 dead transitions. [2024-11-28 05:12:58,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 258 transitions, 2508 flow [2024-11-28 05:12:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:12:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:12:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 416 transitions. [2024-11-28 05:12:58,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-28 05:12:58,454 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1279 flow. Second operand 8 states and 416 transitions. [2024-11-28 05:12:58,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 258 transitions, 2508 flow [2024-11-28 05:12:58,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 2358 flow, removed 21 selfloop flow, removed 14 redundant places. [2024-11-28 05:12:58,704 INFO L231 Difference]: Finished difference. Result has 159 places, 151 transitions, 1420 flow [2024-11-28 05:12:58,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=159, PETRI_TRANSITIONS=151} [2024-11-28 05:12:58,705 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2024-11-28 05:12:58,705 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 151 transitions, 1420 flow [2024-11-28 05:12:58,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:58,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:58,705 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:58,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 05:12:58,705 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:12:58,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1390978036, now seen corresponding path program 2 times [2024-11-28 05:12:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:58,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496464766] [2024-11-28 05:12:58,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:58,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:58,723 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:12:58,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:12:58,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:58,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496464766] [2024-11-28 05:12:58,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496464766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:12:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:12:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:12:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313685296] [2024-11-28 05:12:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:12:58,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:12:58,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:58,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:12:58,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:12:58,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:12:58,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 151 transitions, 1420 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:58,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:58,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:12:58,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:03,335 INFO L124 PetriNetUnfolderBase]: 15870/24570 cut-off events. [2024-11-28 05:13:03,335 INFO L125 PetriNetUnfolderBase]: For 58063/60192 co-relation queries the response was YES. [2024-11-28 05:13:03,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87524 conditions, 24570 events. 15870/24570 cut-off events. For 58063/60192 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 178353 event pairs, 930 based on Foata normal form. 1338/23194 useless extension candidates. Maximal degree in co-relation 64696. Up to 10917 conditions per place. [2024-11-28 05:13:03,637 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 219 selfloop transitions, 37 changer transitions 0/276 dead transitions. [2024-11-28 05:13:03,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 276 transitions, 2660 flow [2024-11-28 05:13:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:13:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:13:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 391 transitions. [2024-11-28 05:13:03,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6276083467094703 [2024-11-28 05:13:03,837 INFO L175 Difference]: Start difference. First operand has 159 places, 151 transitions, 1420 flow. Second operand 7 states and 391 transitions. [2024-11-28 05:13:03,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 276 transitions, 2660 flow [2024-11-28 05:13:04,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 276 transitions, 2625 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 05:13:04,200 INFO L231 Difference]: Finished difference. Result has 164 places, 160 transitions, 1575 flow [2024-11-28 05:13:04,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=164, PETRI_TRANSITIONS=160} [2024-11-28 05:13:04,201 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2024-11-28 05:13:04,201 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 160 transitions, 1575 flow [2024-11-28 05:13:04,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:04,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:04,201 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:04,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 05:13:04,201 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:13:04,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash -7325802, now seen corresponding path program 3 times [2024-11-28 05:13:04,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:04,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909441528] [2024-11-28 05:13:04,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:04,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:04,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:13:04,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:13:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909441528] [2024-11-28 05:13:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909441528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:13:04,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:13:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:13:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387631214] [2024-11-28 05:13:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:13:04,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:13:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:04,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:13:04,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:13:04,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-28 05:13:04,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 160 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:04,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:04,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-28 05:13:04,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:08,586 INFO L124 PetriNetUnfolderBase]: 16526/25894 cut-off events. [2024-11-28 05:13:08,586 INFO L125 PetriNetUnfolderBase]: For 83286/86426 co-relation queries the response was YES. [2024-11-28 05:13:08,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96019 conditions, 25894 events. 16526/25894 cut-off events. For 83286/86426 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 191448 event pairs, 3816 based on Foata normal form. 1630/24742 useless extension candidates. Maximal degree in co-relation 72082. Up to 7848 conditions per place. [2024-11-28 05:13:08,862 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 251 selfloop transitions, 32 changer transitions 0/303 dead transitions. [2024-11-28 05:13:08,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 303 transitions, 3021 flow [2024-11-28 05:13:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:13:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:13:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2024-11-28 05:13:08,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.637239165329053 [2024-11-28 05:13:08,864 INFO L175 Difference]: Start difference. First operand has 164 places, 160 transitions, 1575 flow. Second operand 7 states and 397 transitions. [2024-11-28 05:13:08,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 303 transitions, 3021 flow [2024-11-28 05:13:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 303 transitions, 2872 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-11-28 05:13:09,571 INFO L231 Difference]: Finished difference. Result has 168 places, 174 transitions, 1731 flow [2024-11-28 05:13:09,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1731, PETRI_PLACES=168, PETRI_TRANSITIONS=174} [2024-11-28 05:13:09,571 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 82 predicate places. [2024-11-28 05:13:09,571 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 174 transitions, 1731 flow [2024-11-28 05:13:09,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:09,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:09,572 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:09,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 05:13:09,572 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:13:09,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1720340320, now seen corresponding path program 2 times [2024-11-28 05:13:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962811913] [2024-11-28 05:13:09,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:09,610 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:09,610 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 05:13:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962811913] [2024-11-28 05:13:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962811913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325401328] [2024-11-28 05:13:10,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:10,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:10,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:10,247 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:10,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:13:10,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:10,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:10,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 05:13:10,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:10,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 05:13:10,574 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 05:13:10,574 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 20 treesize of output 22 [2024-11-28 05:13:10,728 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-28 05:13:10,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-28 05:13:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:13:11,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:13:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325401328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:12,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 31 [2024-11-28 05:13:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094342613] [2024-11-28 05:13:12,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:12,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:13:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:12,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:13:12,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:13:17,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 89 [2024-11-28 05:13:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 174 transitions, 1731 flow. Second operand has 33 states, 33 states have (on average 29.575757575757574) internal successors, (976), 33 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:17,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:17,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 89 [2024-11-28 05:13:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:28,573 INFO L124 PetriNetUnfolderBase]: 30158/44483 cut-off events. [2024-11-28 05:13:28,573 INFO L125 PetriNetUnfolderBase]: For 137194/141406 co-relation queries the response was YES. [2024-11-28 05:13:28,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164958 conditions, 44483 events. 30158/44483 cut-off events. For 137194/141406 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 320615 event pairs, 3063 based on Foata normal form. 3242/41689 useless extension candidates. Maximal degree in co-relation 123050. Up to 12098 conditions per place. [2024-11-28 05:13:29,163 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 365 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2024-11-28 05:13:29,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 447 transitions, 4553 flow [2024-11-28 05:13:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:13:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:13:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 804 transitions. [2024-11-28 05:13:29,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4301765650080257 [2024-11-28 05:13:29,166 INFO L175 Difference]: Start difference. First operand has 168 places, 174 transitions, 1731 flow. Second operand 21 states and 804 transitions. [2024-11-28 05:13:29,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 447 transitions, 4553 flow [2024-11-28 05:13:31,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 447 transitions, 4462 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-11-28 05:13:31,857 INFO L231 Difference]: Finished difference. Result has 187 places, 187 transitions, 1980 flow [2024-11-28 05:13:31,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1980, PETRI_PLACES=187, PETRI_TRANSITIONS=187} [2024-11-28 05:13:31,858 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 101 predicate places. [2024-11-28 05:13:31,858 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 187 transitions, 1980 flow [2024-11-28 05:13:31,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 29.575757575757574) internal successors, (976), 33 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:31,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:31,859 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:31,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:32,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:13:32,060 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:13:32,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1720340316, now seen corresponding path program 1 times [2024-11-28 05:13:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:32,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62649223] [2024-11-28 05:13:32,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:13:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62649223] [2024-11-28 05:13:32,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62649223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252180809] [2024-11-28 05:13:32,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:32,533 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:13:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:32,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:13:32,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:32,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 05:13:32,975 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:13:32,976 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 32 treesize of output 27 [2024-11-28 05:13:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:13:33,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:13:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252180809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 26 [2024-11-28 05:13:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969390828] [2024-11-28 05:13:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:33,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:13:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:33,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:13:33,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:13:36,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-28 05:13:36,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 187 transitions, 1980 flow. Second operand has 27 states, 27 states have (on average 35.666666666666664) internal successors, (963), 27 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:36,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:36,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-28 05:13:36,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:47,834 INFO L124 PetriNetUnfolderBase]: 34066/52012 cut-off events. [2024-11-28 05:13:47,834 INFO L125 PetriNetUnfolderBase]: For 195778/200368 co-relation queries the response was YES. [2024-11-28 05:13:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203546 conditions, 52012 events. 34066/52012 cut-off events. For 195778/200368 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 402528 event pairs, 8925 based on Foata normal form. 3809/50376 useless extension candidates. Maximal degree in co-relation 159840. Up to 12871 conditions per place. [2024-11-28 05:13:48,749 INFO L140 encePairwiseOnDemand]: 74/89 looper letters, 397 selfloop transitions, 112 changer transitions 0/527 dead transitions. [2024-11-28 05:13:48,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 527 transitions, 5617 flow [2024-11-28 05:13:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:13:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:13:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 902 transitions. [2024-11-28 05:13:48,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5334121821407452 [2024-11-28 05:13:48,751 INFO L175 Difference]: Start difference. First operand has 187 places, 187 transitions, 1980 flow. Second operand 19 states and 902 transitions. [2024-11-28 05:13:48,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 527 transitions, 5617 flow [2024-11-28 05:13:52,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 527 transitions, 5575 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-28 05:13:52,961 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2993 flow [2024-11-28 05:13:52,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2993, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-11-28 05:13:52,962 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 117 predicate places. [2024-11-28 05:13:52,962 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2993 flow [2024-11-28 05:13:52,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 35.666666666666664) internal successors, (963), 27 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:52,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:52,962 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:52,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:13:53,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:53,163 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-28 05:13:53,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1720340318, now seen corresponding path program 1 times [2024-11-28 05:13:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:53,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418619535] [2024-11-28 05:13:53,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:53,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 05:13:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418619535] [2024-11-28 05:13:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418619535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491597833] [2024-11-28 05:13:53,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:13:53,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:53,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:53,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b41962-75a1-4a59-ac21-ab19b405f68e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:13:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:53,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:13:53,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:53,918 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 [2024-11-28 05:13:53,927 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 [2024-11-28 05:13:54,074 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 05:13:54,074 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 31 treesize of output 28 [2024-11-28 05:13:54,105 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:13:54,105 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 [2024-11-28 05:13:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:13:54,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:55,441 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:13:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:13:55,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491597833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:55,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:55,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 9] total 25 [2024-11-28 05:13:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249160583] [2024-11-28 05:13:55,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:55,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:13:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:55,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:13:55,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:13:58,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-28 05:13:58,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2993 flow. Second operand has 26 states, 26 states have (on average 31.03846153846154) internal successors, (807), 26 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:13:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:58,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-28 05:13:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand