./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/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_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/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_2e33960f-84f5-4691-a7a3-91263841913d/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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:00:57,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:00:57,569 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:00:57,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:00:57,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:00:57,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:00:57,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:00:57,637 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:00:57,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:00:57,639 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:00:57,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:00:57,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:00:57,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:00:57,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:00:57,642 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:00:57,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:00:57,642 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:00:57,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:00:57,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:00:57,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:00:57,643 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:00:57,645 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:00:57,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:00:57,646 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:00:57,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:00:57,647 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:00:57,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:00:57,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:00:57,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:00:57,647 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:00:57,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:00:57,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:00:57,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:00:57,648 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_2e33960f-84f5-4691-a7a3-91263841913d/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 -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-28 05:00:58,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:00:58,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:00:58,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:00:58,096 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:00:58,097 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:00:58,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-28 05:01:01,828 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/data/e04f00a1a/a15488e19f4041db9f5d9672cc104aa0/FLAG3af200262 [2024-11-28 05:01:02,303 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:01:02,305 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-28 05:01:02,323 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/data/e04f00a1a/a15488e19f4041db9f5d9672cc104aa0/FLAG3af200262 [2024-11-28 05:01:02,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/data/e04f00a1a/a15488e19f4041db9f5d9672cc104aa0 [2024-11-28 05:01:02,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:01:02,449 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:01:02,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:01:02,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:01:02,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:01:02,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:02,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704836bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02, skipping insertion in model container [2024-11-28 05:01:02,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:02,492 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:01:02,811 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 05:01:02,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:01:02,831 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:01:02,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:01:02,923 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:01:02,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02 WrapperNode [2024-11-28 05:01:02,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:01:02,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:01:02,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:01:02,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:01:02,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:02,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,016 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 405 [2024-11-28 05:01:03,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:01:03,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:01:03,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:01:03,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:01:03,030 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,059 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 05:01:03,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,079 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:01:03,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:01:03,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:01:03,120 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:01:03,121 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (1/1) ... [2024-11-28 05:01:03,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:01:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:03,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:01:03,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:01:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:01:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:01:03,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:01:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:01:03,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:01:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:01:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:01:03,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:01:03,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:01:03,227 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 05:01:03,431 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:01:03,433 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:01:04,684 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:01:04,684 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:01:05,705 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:01:05,705 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:01:05,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:01:05 BoogieIcfgContainer [2024-11-28 05:01:05,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:01:05,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:01:05,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:01:05,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:01:05,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:01:02" (1/3) ... [2024-11-28 05:01:05,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113ceb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:01:05, skipping insertion in model container [2024-11-28 05:01:05,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:01:02" (2/3) ... [2024-11-28 05:01:05,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113ceb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:01:05, skipping insertion in model container [2024-11-28 05:01:05,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:01:05" (3/3) ... [2024-11-28 05:01:05,722 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-28 05:01:05,746 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:01:05,748 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-symm.wvr.c that has 3 procedures, 107 locations, 1 initial locations, 4 loop locations, and 38 error locations. [2024-11-28 05:01:05,748 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:01:05,943 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:01:06,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-11-28 05:01:06,130 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-11-28 05:01:06,136 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:01:06,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 386 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-11-28 05:01:06,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-11-28 05:01:06,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-11-28 05:01:06,176 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:01:06,201 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;@4a3974c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:01:06,202 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-11-28 05:01:06,210 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:01:06,210 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:01:06,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:01:06,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:06,212 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:01:06,212 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:06,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1301232, now seen corresponding path program 1 times [2024-11-28 05:01:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868171096] [2024-11-28 05:01:06,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:06,731 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 05:01:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868171096] [2024-11-28 05:01:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868171096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:06,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:01:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889551797] [2024-11-28 05:01:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:06,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:06,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:06,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:06,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:06,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-28 05:01:06,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 05:01:06,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:06,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-28 05:01:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:08,132 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-11-28 05:01:08,133 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 05:01:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25209 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-11-28 05:01:08,174 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-28 05:01:08,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-11-28 05:01:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:01:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-28 05:01:08,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-11-28 05:01:08,204 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-11-28 05:01:08,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-11-28 05:01:08,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:01:08,221 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-11-28 05:01:08,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-11-28 05:01:08,232 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-28 05:01:08,234 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-11-28 05:01:08,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 05:01:08,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:08,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:01:08,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:01:08,236 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:08,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1301233, now seen corresponding path program 1 times [2024-11-28 05:01:08,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:08,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916385626] [2024-11-28 05:01:08,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:08,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:08,749 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 05:01:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:08,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916385626] [2024-11-28 05:01:08,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916385626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:08,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:08,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069267376] [2024-11-28 05:01:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:08,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:01:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:08,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:01:08,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:01:08,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-28 05:01:08,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 05:01:08,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:08,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-28 05:01:08,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:09,683 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-11-28 05:01:09,684 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 05:01:09,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-11-28 05:01:09,713 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-28 05:01:09,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-11-28 05:01:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:01:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:01:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-28 05:01:09,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-11-28 05:01:09,717 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-11-28 05:01:09,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-11-28 05:01:09,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:01:09,722 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-11-28 05:01:09,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-28 05:01:09,723 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-11-28 05:01:09,724 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-11-28 05:01:09,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 05:01:09,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:09,724 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:01:09,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:01:09,725 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:09,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1250527236, now seen corresponding path program 1 times [2024-11-28 05:01:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850764947] [2024-11-28 05:01:09,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:10,255 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 05:01:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850764947] [2024-11-28 05:01:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850764947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:10,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909634668] [2024-11-28 05:01:10,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:10,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:10,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:01:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:10,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:01:10,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:10,507 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 05:01:10,611 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 05:01:10,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:10,725 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 05:01:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909634668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:10,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-28 05:01:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128587175] [2024-11-28 05:01:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:10,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:01:10,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:10,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:01:10,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:01:11,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-28 05:01:11,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 05:01:11,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-28 05:01:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:12,176 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-11-28 05:01:12,177 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 05:01:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 25279 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-11-28 05:01:12,204 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-11-28 05:01:12,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-11-28 05:01:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:01:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:01:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-11-28 05:01:12,208 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-11-28 05:01:12,208 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-11-28 05:01:12,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-11-28 05:01:12,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:01:12,213 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-11-28 05:01:12,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-11-28 05:01:12,214 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-11-28 05:01:12,214 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-11-28 05:01:12,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 05:01:12,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:12,217 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-28 05:01:12,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:01:12,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:12,422 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:12,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1090422083, now seen corresponding path program 2 times [2024-11-28 05:01:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186025969] [2024-11-28 05:01:12,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:12,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:01:12,489 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:13,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186025969] [2024-11-28 05:01:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186025969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891722105] [2024-11-28 05:01:13,078 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:13,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:13,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:01:13,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:01:13,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:13,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:01:13,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:13,248 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 05:01:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:13,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891722105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:13,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-28 05:01:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143588484] [2024-11-28 05:01:13,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:13,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:01:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:13,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:01:13,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:01:15,611 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-28 05:01:15,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 05:01:15,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:15,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-28 05:01:15,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:17,445 INFO L124 PetriNetUnfolderBase]: 1454/3487 cut-off events. [2024-11-28 05:01:17,445 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-28 05:01:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5684 conditions, 3487 events. 1454/3487 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 25293 event pairs, 790 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2087 conditions per place. [2024-11-28 05:01:17,473 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 61 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-11-28 05:01:17,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 572 flow [2024-11-28 05:01:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:01:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:01:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-28 05:01:17,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 05:01:17,477 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 9 states and 648 transitions. [2024-11-28 05:01:17,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 572 flow [2024-11-28 05:01:17,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 508 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-28 05:01:17,489 INFO L231 Difference]: Finished difference. Result has 114 places, 135 transitions, 382 flow [2024-11-28 05:01:17,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=114, PETRI_TRANSITIONS=135} [2024-11-28 05:01:17,490 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-28 05:01:17,494 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 135 transitions, 382 flow [2024-11-28 05:01:17,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 05:01:17,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:17,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:17,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:17,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:17,696 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:17,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1576030077, now seen corresponding path program 1 times [2024-11-28 05:01:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:17,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596899756] [2024-11-28 05:01:17,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:17,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596899756] [2024-11-28 05:01:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596899756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361973928] [2024-11-28 05:01:17,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:17,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:17,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:17,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:17,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:01:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:18,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:01:18,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:18,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:01:18,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361973928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:18,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:18,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-28 05:01:18,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735442224] [2024-11-28 05:01:18,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:18,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:01:18,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:18,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:01:18,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:01:18,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:01:18,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 135 transitions, 382 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 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 05:01:18,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:18,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:01:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:18,879 INFO L124 PetriNetUnfolderBase]: 1448/3481 cut-off events. [2024-11-28 05:01:18,879 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-28 05:01:18,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5662 conditions, 3481 events. 1448/3481 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25171 event pairs, 790 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 5557. Up to 2090 conditions per place. [2024-11-28 05:01:18,906 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-28 05:01:18,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 538 flow [2024-11-28 05:01:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:01:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:01:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-11-28 05:01:18,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-28 05:01:18,909 INFO L175 Difference]: Start difference. First operand has 114 places, 135 transitions, 382 flow. Second operand 6 states and 462 transitions. [2024-11-28 05:01:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 538 flow [2024-11-28 05:01:18,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 137 transitions, 501 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 05:01:18,914 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 372 flow [2024-11-28 05:01:18,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-11-28 05:01:18,916 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-28 05:01:18,916 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 372 flow [2024-11-28 05:01:18,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 0 states have call successors, (0), 0 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 05:01:18,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:18,917 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:18,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:01:19,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:19,121 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:19,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1331933000, now seen corresponding path program 2 times [2024-11-28 05:01:19,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465143821] [2024-11-28 05:01:19,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:19,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:01:19,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 05:01:19,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:19,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465143821] [2024-11-28 05:01:19,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465143821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:19,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:19,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:01:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683077635] [2024-11-28 05:01:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:19,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:01:19,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:19,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:01:19,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:01:19,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-28 05:01:19,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 05:01:19,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:19,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-28 05:01:19,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:20,049 INFO L124 PetriNetUnfolderBase]: 1448/3293 cut-off events. [2024-11-28 05:01:20,050 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-28 05:01:20,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5488 conditions, 3293 events. 1448/3293 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 22562 event pairs, 790 based on Foata normal form. 0/2645 useless extension candidates. Maximal degree in co-relation 5367. Up to 2083 conditions per place. [2024-11-28 05:01:20,073 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 69 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2024-11-28 05:01:20,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 123 transitions, 504 flow [2024-11-28 05:01:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:01:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:01:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-11-28 05:01:20,077 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-28 05:01:20,077 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 372 flow. Second operand 5 states and 336 transitions. [2024-11-28 05:01:20,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 123 transitions, 504 flow [2024-11-28 05:01:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 123 transitions, 487 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 05:01:20,081 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 349 flow [2024-11-28 05:01:20,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-11-28 05:01:20,084 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -3 predicate places. [2024-11-28 05:01:20,084 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 349 flow [2024-11-28 05:01:20,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 05:01:20,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:20,087 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:20,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:01:20,087 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:20,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1331933001, now seen corresponding path program 1 times [2024-11-28 05:01:20,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782179517] [2024-11-28 05:01:20,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:01:20,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:20,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782179517] [2024-11-28 05:01:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782179517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:20,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947463921] [2024-11-28 05:01:20,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:20,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:20,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:01:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:20,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:01:20,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:01:20,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:01:20,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947463921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:20,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:20,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 05:01:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39119911] [2024-11-28 05:01:20,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:20,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:01:20,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:20,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:01:20,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:01:20,812 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:01:20,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 349 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 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 05:01:20,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:20,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:01:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:21,503 INFO L124 PetriNetUnfolderBase]: 1446/3291 cut-off events. [2024-11-28 05:01:21,503 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-28 05:01:21,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5471 conditions, 3291 events. 1446/3291 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 22544 event pairs, 790 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 5365. Up to 2087 conditions per place. [2024-11-28 05:01:21,526 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 62 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-11-28 05:01:21,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 127 transitions, 516 flow [2024-11-28 05:01:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:01:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:01:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2024-11-28 05:01:21,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-11-28 05:01:21,532 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 349 flow. Second operand 8 states and 592 transitions. [2024-11-28 05:01:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 127 transitions, 516 flow [2024-11-28 05:01:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 127 transitions, 511 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:01:21,542 INFO L231 Difference]: Finished difference. Result has 111 places, 121 transitions, 363 flow [2024-11-28 05:01:21,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=111, PETRI_TRANSITIONS=121} [2024-11-28 05:01:21,543 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 1 predicate places. [2024-11-28 05:01:21,543 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 121 transitions, 363 flow [2024-11-28 05:01:21,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 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 05:01:21,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:21,544 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:21,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:21,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:21,749 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:21,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1171090846, now seen corresponding path program 2 times [2024-11-28 05:01:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135046243] [2024-11-28 05:01:21,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:21,803 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:01:21,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:01:22,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:22,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135046243] [2024-11-28 05:01:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135046243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:22,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:01:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7207387] [2024-11-28 05:01:22,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:22,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:01:22,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:22,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:01:22,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:01:22,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-11-28 05:01:22,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 121 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:22,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:22,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-11-28 05:01:22,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:23,728 INFO L124 PetriNetUnfolderBase]: 3171/6440 cut-off events. [2024-11-28 05:01:23,729 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-28 05:01:23,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11199 conditions, 6440 events. 3171/6440 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 43088 event pairs, 1228 based on Foata normal form. 0/5142 useless extension candidates. Maximal degree in co-relation 11079. Up to 2560 conditions per place. [2024-11-28 05:01:23,767 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 5 changer transitions 0/168 dead transitions. [2024-11-28 05:01:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 168 transitions, 706 flow [2024-11-28 05:01:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:01:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:01:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-11-28 05:01:23,770 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-11-28 05:01:23,770 INFO L175 Difference]: Start difference. First operand has 111 places, 121 transitions, 363 flow. Second operand 6 states and 461 transitions. [2024-11-28 05:01:23,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 168 transitions, 706 flow [2024-11-28 05:01:23,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 674 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-28 05:01:23,775 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 355 flow [2024-11-28 05:01:23,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-11-28 05:01:23,778 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2024-11-28 05:01:23,778 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 355 flow [2024-11-28 05:01:23,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:23,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:23,779 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:23,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:01:23,779 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:23,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash -864458843, now seen corresponding path program 1 times [2024-11-28 05:01:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147441005] [2024-11-28 05:01:23,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 05:01:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147441005] [2024-11-28 05:01:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147441005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411865875] [2024-11-28 05:01:24,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:24,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:24,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:24,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:24,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:01:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:24,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:01:24,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:01:25,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:25,298 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 20 treesize of output 16 [2024-11-28 05:01:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:01:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411865875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:25,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:25,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-28 05:01:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462742078] [2024-11-28 05:01:25,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:25,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:01:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:25,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:01:25,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:01:27,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:01:27,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 355 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 05:01:27,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:27,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:01:27,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:30,782 INFO L124 PetriNetUnfolderBase]: 6337/12780 cut-off events. [2024-11-28 05:01:30,783 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-11-28 05:01:30,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22723 conditions, 12780 events. 6337/12780 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 93572 event pairs, 1161 based on Foata normal form. 0/11150 useless extension candidates. Maximal degree in co-relation 22616. Up to 3752 conditions per place. [2024-11-28 05:01:30,861 INFO L140 encePairwiseOnDemand]: 114/126 looper letters, 144 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-11-28 05:01:30,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 204 transitions, 869 flow [2024-11-28 05:01:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:01:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:01:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 760 transitions. [2024-11-28 05:01:30,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-28 05:01:30,865 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 355 flow. Second operand 10 states and 760 transitions. [2024-11-28 05:01:30,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 204 transitions, 869 flow [2024-11-28 05:01:30,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 857 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:01:30,871 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 390 flow [2024-11-28 05:01:30,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-28 05:01:30,872 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-11-28 05:01:30,873 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 390 flow [2024-11-28 05:01:30,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 05:01:30,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:30,874 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:30,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:01:31,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:31,078 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:31,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash -864458844, now seen corresponding path program 1 times [2024-11-28 05:01:31,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:31,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604084673] [2024-11-28 05:01:31,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 05:01:31,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:31,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604084673] [2024-11-28 05:01:31,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604084673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:31,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:31,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:01:31,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463900296] [2024-11-28 05:01:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:31,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:01:31,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:31,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:01:31,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:01:31,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-28 05:01:31,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 05:01:31,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:31,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-28 05:01:31,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:32,991 INFO L124 PetriNetUnfolderBase]: 6201/11906 cut-off events. [2024-11-28 05:01:32,991 INFO L125 PetriNetUnfolderBase]: For 1271/1291 co-relation queries the response was YES. [2024-11-28 05:01:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22510 conditions, 11906 events. 6201/11906 cut-off events. For 1271/1291 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 81764 event pairs, 3811 based on Foata normal form. 224/10730 useless extension candidates. Maximal degree in co-relation 22392. Up to 9068 conditions per place. [2024-11-28 05:01:33,053 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 73 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-28 05:01:33,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 524 flow [2024-11-28 05:01:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:01:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:01:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-28 05:01:33,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-28 05:01:33,057 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 390 flow. Second operand 4 states and 282 transitions. [2024-11-28 05:01:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 524 flow [2024-11-28 05:01:33,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 503 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:01:33,066 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 357 flow [2024-11-28 05:01:33,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-11-28 05:01:33,069 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-28 05:01:33,069 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 357 flow [2024-11-28 05:01:33,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 05:01:33,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:33,069 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:33,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:01:33,070 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:33,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -136826490, now seen corresponding path program 1 times [2024-11-28 05:01:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589041999] [2024-11-28 05:01:33,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 05:01:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589041999] [2024-11-28 05:01:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589041999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118240268] [2024-11-28 05:01:33,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:33,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:33,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:33,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:01:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:33,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:01:33,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:01:34,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:34,344 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 20 treesize of output 16 [2024-11-28 05:01:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:01:34,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118240268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:34,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-28 05:01:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597022098] [2024-11-28 05:01:34,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:34,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:01:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:34,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:01:34,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:01:36,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:01:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 357 flow. Second operand has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 05:01:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:01:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:39,172 INFO L124 PetriNetUnfolderBase]: 9460/18103 cut-off events. [2024-11-28 05:01:39,172 INFO L125 PetriNetUnfolderBase]: For 2107/2185 co-relation queries the response was YES. [2024-11-28 05:01:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34549 conditions, 18103 events. 9460/18103 cut-off events. For 2107/2185 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 129653 event pairs, 2682 based on Foata normal form. 0/15485 useless extension candidates. Maximal degree in co-relation 34440. Up to 5035 conditions per place. [2024-11-28 05:01:39,276 INFO L140 encePairwiseOnDemand]: 111/126 looper letters, 164 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2024-11-28 05:01:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 983 flow [2024-11-28 05:01:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:01:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:01:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2024-11-28 05:01:39,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-28 05:01:39,281 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 357 flow. Second operand 10 states and 780 transitions. [2024-11-28 05:01:39,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 983 flow [2024-11-28 05:01:39,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 216 transitions, 980 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:01:39,297 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 443 flow [2024-11-28 05:01:39,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=443, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-11-28 05:01:39,299 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-28 05:01:39,299 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 443 flow [2024-11-28 05:01:39,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 05:01:39,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:39,301 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:39,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:01:39,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:01:39,502 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:39,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1816213399, now seen corresponding path program 1 times [2024-11-28 05:01:39,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:39,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911281831] [2024-11-28 05:01:39,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 05:01:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911281831] [2024-11-28 05:01:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911281831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061800341] [2024-11-28 05:01:40,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:40,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:40,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:01:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:40,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 05:01:40,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:40,423 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 05:01:40,667 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 05:01:40,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-28 05:01:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:41,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:01:41,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061800341] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:41,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:41,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 14] total 27 [2024-11-28 05:01:41,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252144978] [2024-11-28 05:01:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:41,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:01:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:41,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:01:41,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:01:42,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:01:42,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 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 05:01:42,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:42,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:01:42,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:45,088 INFO L124 PetriNetUnfolderBase]: 11645/21107 cut-off events. [2024-11-28 05:01:45,088 INFO L125 PetriNetUnfolderBase]: For 6559/6939 co-relation queries the response was YES. [2024-11-28 05:01:45,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42954 conditions, 21107 events. 11645/21107 cut-off events. For 6559/6939 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 148518 event pairs, 4244 based on Foata normal form. 0/18045 useless extension candidates. Maximal degree in co-relation 42833. Up to 8492 conditions per place. [2024-11-28 05:01:45,198 INFO L140 encePairwiseOnDemand]: 113/126 looper letters, 125 selfloop transitions, 10 changer transitions 0/169 dead transitions. [2024-11-28 05:01:45,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 869 flow [2024-11-28 05:01:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:01:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:01:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-11-28 05:01:45,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-11-28 05:01:45,200 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 443 flow. Second operand 6 states and 471 transitions. [2024-11-28 05:01:45,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 869 flow [2024-11-28 05:01:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 844 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-28 05:01:45,219 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 487 flow [2024-11-28 05:01:45,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-28 05:01:45,220 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-28 05:01:45,221 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 487 flow [2024-11-28 05:01:45,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 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 05:01:45,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:45,221 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:45,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:45,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:45,426 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:45,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash 782833830, now seen corresponding path program 1 times [2024-11-28 05:01:45,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:45,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009496707] [2024-11-28 05:01:45,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:45,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:01:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009496707] [2024-11-28 05:01:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009496707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:46,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:46,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:01:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530387742] [2024-11-28 05:01:46,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:46,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:01:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:46,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:01:46,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:01:46,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:01:46,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:01:46,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:46,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:01:46,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:49,904 INFO L124 PetriNetUnfolderBase]: 11186/20861 cut-off events. [2024-11-28 05:01:49,904 INFO L125 PetriNetUnfolderBase]: For 10691/11063 co-relation queries the response was YES. [2024-11-28 05:01:49,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45046 conditions, 20861 events. 11186/20861 cut-off events. For 10691/11063 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 150231 event pairs, 6724 based on Foata normal form. 6/18319 useless extension candidates. Maximal degree in co-relation 44931. Up to 15553 conditions per place. [2024-11-28 05:01:50,023 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 115 selfloop transitions, 1 changer transitions 9/163 dead transitions. [2024-11-28 05:01:50,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 163 transitions, 874 flow [2024-11-28 05:01:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:01:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:01:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-11-28 05:01:50,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2024-11-28 05:01:50,026 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 487 flow. Second operand 4 states and 349 transitions. [2024-11-28 05:01:50,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 163 transitions, 874 flow [2024-11-28 05:01:50,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 869 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:01:50,048 INFO L231 Difference]: Finished difference. Result has 116 places, 123 transitions, 491 flow [2024-11-28 05:01:50,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=491, PETRI_PLACES=116, PETRI_TRANSITIONS=123} [2024-11-28 05:01:50,049 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 6 predicate places. [2024-11-28 05:01:50,049 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 123 transitions, 491 flow [2024-11-28 05:01:50,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:01:50,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:50,050 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:50,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 05:01:50,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:50,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -849478758, now seen corresponding path program 2 times [2024-11-28 05:01:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747198687] [2024-11-28 05:01:50,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:50,086 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:01:50,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:01:50,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:50,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747198687] [2024-11-28 05:01:50,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747198687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:50,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:50,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:01:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351656400] [2024-11-28 05:01:50,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:50,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:01:50,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:50,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:01:50,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:01:50,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:01:50,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 123 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:01:50,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:50,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:01:50,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:56,146 INFO L124 PetriNetUnfolderBase]: 20161/37103 cut-off events. [2024-11-28 05:01:56,146 INFO L125 PetriNetUnfolderBase]: For 20064/20871 co-relation queries the response was YES. [2024-11-28 05:01:56,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81437 conditions, 37103 events. 20161/37103 cut-off events. For 20064/20871 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 292796 event pairs, 5699 based on Foata normal form. 1/32996 useless extension candidates. Maximal degree in co-relation 81337. Up to 15615 conditions per place. [2024-11-28 05:01:56,378 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 147 selfloop transitions, 10 changer transitions 2/197 dead transitions. [2024-11-28 05:01:56,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 197 transitions, 1077 flow [2024-11-28 05:01:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:01:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:01:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2024-11-28 05:01:56,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.748015873015873 [2024-11-28 05:01:56,381 INFO L175 Difference]: Start difference. First operand has 116 places, 123 transitions, 491 flow. Second operand 4 states and 377 transitions. [2024-11-28 05:01:56,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 197 transitions, 1077 flow [2024-11-28 05:01:56,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 197 transitions, 1071 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 05:01:56,426 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 585 flow [2024-11-28 05:01:56,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=585, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-11-28 05:01:56,427 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-11-28 05:01:56,427 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 585 flow [2024-11-28 05:01:56,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:01:56,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:56,428 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:56,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 05:01:56,428 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:01:56,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1480071404, now seen corresponding path program 1 times [2024-11-28 05:01:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224238244] [2024-11-28 05:01:56,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:56,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:01:56,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224238244] [2024-11-28 05:01:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224238244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:01:56,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:01:56,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:01:56,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049826241] [2024-11-28 05:01:56,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:01:56,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:01:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:56,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:01:56,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:01:56,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:01:56,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 585 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 05:01:56,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:56,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:01:56,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:02,485 INFO L124 PetriNetUnfolderBase]: 19431/36330 cut-off events. [2024-11-28 05:02:02,485 INFO L125 PetriNetUnfolderBase]: For 25652/26539 co-relation queries the response was YES. [2024-11-28 05:02:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83163 conditions, 36330 events. 19431/36330 cut-off events. For 25652/26539 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 289757 event pairs, 6590 based on Foata normal form. 161/31921 useless extension candidates. Maximal degree in co-relation 83047. Up to 28035 conditions per place. [2024-11-28 05:02:02,755 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 95 selfloop transitions, 3 changer transitions 5/141 dead transitions. [2024-11-28 05:02:02,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 814 flow [2024-11-28 05:02:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:02:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:02:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-28 05:02:02,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6957671957671958 [2024-11-28 05:02:02,758 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 585 flow. Second operand 3 states and 263 transitions. [2024-11-28 05:02:02,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 814 flow [2024-11-28 05:02:02,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 814 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 05:02:02,795 INFO L231 Difference]: Finished difference. Result has 122 places, 130 transitions, 586 flow [2024-11-28 05:02:02,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=586, PETRI_PLACES=122, PETRI_TRANSITIONS=130} [2024-11-28 05:02:02,796 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 12 predicate places. [2024-11-28 05:02:02,796 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 130 transitions, 586 flow [2024-11-28 05:02:02,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 05:02:02,796 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:02,796 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:02,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 05:02:02,797 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:02:02,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1328120035, now seen corresponding path program 1 times [2024-11-28 05:02:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289820817] [2024-11-28 05:02:02,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:02:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289820817] [2024-11-28 05:02:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289820817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:02,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:02,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:02:02,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544114414] [2024-11-28 05:02:02,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:02,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:02:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:02,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:02:02,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:02:02,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:02:02,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 130 transitions, 586 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 05:02:02,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:02,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:02:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:08,795 INFO L124 PetriNetUnfolderBase]: 19405/36279 cut-off events. [2024-11-28 05:02:08,796 INFO L125 PetriNetUnfolderBase]: For 25677/26564 co-relation queries the response was YES. [2024-11-28 05:02:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83124 conditions, 36279 events. 19405/36279 cut-off events. For 25677/26564 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 289355 event pairs, 11114 based on Foata normal form. 4/31713 useless extension candidates. Maximal degree in co-relation 83034. Up to 28078 conditions per place. [2024-11-28 05:02:09,003 INFO L140 encePairwiseOnDemand]: 124/126 looper letters, 90 selfloop transitions, 0 changer transitions 4/132 dead transitions. [2024-11-28 05:02:09,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 768 flow [2024-11-28 05:02:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:02:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:02:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2024-11-28 05:02:09,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6693121693121693 [2024-11-28 05:02:09,223 INFO L175 Difference]: Start difference. First operand has 122 places, 130 transitions, 586 flow. Second operand 3 states and 253 transitions. [2024-11-28 05:02:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 768 flow [2024-11-28 05:02:09,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 132 transitions, 752 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 05:02:09,248 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 553 flow [2024-11-28 05:02:09,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=553, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-11-28 05:02:09,249 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-11-28 05:02:09,250 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 553 flow [2024-11-28 05:02:09,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 05:02:09,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:09,250 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:09,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:02:09,251 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:02:09,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1483540303, now seen corresponding path program 1 times [2024-11-28 05:02:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:09,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823621656] [2024-11-28 05:02:09,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:02:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823621656] [2024-11-28 05:02:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823621656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:02:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612127564] [2024-11-28 05:02:09,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:09,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:02:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:09,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:02:09,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:02:09,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-28 05:02:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 553 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:09,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:09,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-28 05:02:09,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:14,799 INFO L124 PetriNetUnfolderBase]: 18278/35505 cut-off events. [2024-11-28 05:02:14,799 INFO L125 PetriNetUnfolderBase]: For 23252/24096 co-relation queries the response was YES. [2024-11-28 05:02:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81002 conditions, 35505 events. 18278/35505 cut-off events. For 23252/24096 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 296252 event pairs, 9326 based on Foata normal form. 200/31258 useless extension candidates. Maximal degree in co-relation 80985. Up to 22270 conditions per place. [2024-11-28 05:02:14,993 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 130 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-28 05:02:14,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 172 transitions, 996 flow [2024-11-28 05:02:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:02:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:02:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-28 05:02:14,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-11-28 05:02:14,995 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 553 flow. Second operand 3 states and 282 transitions. [2024-11-28 05:02:14,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 172 transitions, 996 flow [2024-11-28 05:02:15,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 172 transitions, 994 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-28 05:02:15,021 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 569 flow [2024-11-28 05:02:15,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=569, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-11-28 05:02:15,022 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 11 predicate places. [2024-11-28 05:02:15,022 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 569 flow [2024-11-28 05:02:15,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:15,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:15,023 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:15,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:02:15,023 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:02:15,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1196153179, now seen corresponding path program 1 times [2024-11-28 05:02:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230991494] [2024-11-28 05:02:15,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:02:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230991494] [2024-11-28 05:02:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230991494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:15,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:02:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004227454] [2024-11-28 05:02:15,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:02:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:15,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:02:15,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:02:15,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:02:15,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 05:02:15,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:15,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:02:15,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:23,411 INFO L124 PetriNetUnfolderBase]: 27446/48255 cut-off events. [2024-11-28 05:02:23,411 INFO L125 PetriNetUnfolderBase]: For 33451/34901 co-relation queries the response was YES. [2024-11-28 05:02:23,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117553 conditions, 48255 events. 27446/48255 cut-off events. For 33451/34901 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 382636 event pairs, 10864 based on Foata normal form. 0/43456 useless extension candidates. Maximal degree in co-relation 117534. Up to 26102 conditions per place. [2024-11-28 05:02:23,747 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 237 selfloop transitions, 8 changer transitions 0/278 dead transitions. [2024-11-28 05:02:23,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 278 transitions, 1696 flow [2024-11-28 05:02:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:02:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:02:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-28 05:02:23,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-11-28 05:02:23,751 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 569 flow. Second operand 6 states and 528 transitions. [2024-11-28 05:02:23,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 278 transitions, 1696 flow [2024-11-28 05:02:23,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 278 transitions, 1690 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:23,801 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 603 flow [2024-11-28 05:02:23,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2024-11-28 05:02:23,802 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 17 predicate places. [2024-11-28 05:02:23,802 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 603 flow [2024-11-28 05:02:23,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 05:02:23,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:23,803 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:23,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:02:23,803 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:02:23,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1115941434, now seen corresponding path program 1 times [2024-11-28 05:02:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:23,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6256567] [2024-11-28 05:02:23,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:23,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:02:24,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6256567] [2024-11-28 05:02:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6256567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:24,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:24,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:24,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855211339] [2024-11-28 05:02:24,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:24,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:24,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:24,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:24,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:02:24,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:24,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:24,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:02:24,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:31,881 INFO L124 PetriNetUnfolderBase]: 27132/47883 cut-off events. [2024-11-28 05:02:31,881 INFO L125 PetriNetUnfolderBase]: For 39078/40462 co-relation queries the response was YES. [2024-11-28 05:02:32,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122250 conditions, 47883 events. 27132/47883 cut-off events. For 39078/40462 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 378921 event pairs, 10063 based on Foata normal form. 428/45040 useless extension candidates. Maximal degree in co-relation 122228. Up to 21159 conditions per place. [2024-11-28 05:02:32,103 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 192 selfloop transitions, 13 changer transitions 0/238 dead transitions. [2024-11-28 05:02:32,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 238 transitions, 1480 flow [2024-11-28 05:02:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:02:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2024-11-28 05:02:32,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-11-28 05:02:32,106 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 603 flow. Second operand 5 states and 438 transitions. [2024-11-28 05:02:32,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 238 transitions, 1480 flow [2024-11-28 05:02:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 238 transitions, 1473 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:02:32,186 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 642 flow [2024-11-28 05:02:32,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=642, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-11-28 05:02:32,187 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 21 predicate places. [2024-11-28 05:02:32,187 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 642 flow [2024-11-28 05:02:32,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:32,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:32,187 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:32,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 05:02:32,187 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-28 05:02:32,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -262630905, now seen corresponding path program 1 times [2024-11-28 05:02:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:32,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010955353] [2024-11-28 05:02:32,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:32,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 05:02:32,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010955353] [2024-11-28 05:02:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010955353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51540937] [2024-11-28 05:02:32,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:32,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:32,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e33960f-84f5-4691-a7a3-91263841913d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:02:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:32,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:02:32,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 05:02:32,869 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:02:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51540937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:32,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:02:32,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-28 05:02:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462588328] [2024-11-28 05:02:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:32,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:02:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:32,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:02:32,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:02:32,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-28 05:02:32,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 642 flow. Second operand has 6 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 05:02:32,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:32,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-28 05:02:32,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand