./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --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_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/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_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/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_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:20,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:20,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:08:20,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:20,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:20,214 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:20,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:20,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:20,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:20,216 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:20,216 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:20,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:20,217 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:20,217 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:20,217 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:20,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:20,218 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:20,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:08:20,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:20,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:20,218 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:08:20,219 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:08:20,219 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:08:20,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:20,219 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:08:20,219 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:20,220 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:20,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:20,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:20,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:20,221 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:20,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:20,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:20,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:20,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:20,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:20,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:20,223 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_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/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 -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2024-11-27 20:08:20,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:20,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:20,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:20,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:20,578 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:20,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-11-27 20:08:23,827 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/data/21d42066d/d14416e4c69f4bc08c909b87109c1a4c/FLAGd98498b92 [2024-11-27 20:08:24,258 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:24,259 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-11-27 20:08:24,286 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/data/21d42066d/d14416e4c69f4bc08c909b87109c1a4c/FLAGd98498b92 [2024-11-27 20:08:24,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/data/21d42066d/d14416e4c69f4bc08c909b87109c1a4c [2024-11-27 20:08:24,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:24,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:24,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:24,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:24,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:24,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:24" (1/1) ... [2024-11-27 20:08:24,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4c229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:24, skipping insertion in model container [2024-11-27 20:08:24,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:24" (1/1) ... [2024-11-27 20:08:24,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:24,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:24,912 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:24,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:25,014 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:25,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25 WrapperNode [2024-11-27 20:08:25,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:25,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:25,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:25,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:25,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,036 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,060 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2024-11-27 20:08:25,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:25,062 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:25,062 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:25,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:25,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,107 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-11-27 20:08:25,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,129 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:25,154 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:25,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:25,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:25,159 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (1/1) ... [2024-11-27 20:08:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:25,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:25,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a67add1-e2e6-4bd2-80c4-fcd05ec9bf3e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-27 20:08:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-27 20:08:25,252 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:08:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:08:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 20:08:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 20:08:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:25,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:25,255 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:08:25,473 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:25,475 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:25,905 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:08:25,905 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:26,178 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:26,179 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 20:08:26,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:26 BoogieIcfgContainer [2024-11-27 20:08:26,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:26,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:26,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:26,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:26,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:24" (1/3) ... [2024-11-27 20:08:26,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a0ffe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:26, skipping insertion in model container [2024-11-27 20:08:26,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:25" (2/3) ... [2024-11-27 20:08:26,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a0ffe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:26, skipping insertion in model container [2024-11-27 20:08:26,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:26" (3/3) ... [2024-11-27 20:08:26,199 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2024-11-27 20:08:26,219 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:26,221 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_36-indirect_racefree.i that has 2 procedures, 64 locations, 1 initial locations, 6 loop locations, and 16 error locations. [2024-11-27 20:08:26,221 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:08:26,307 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-27 20:08:26,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 75 transitions, 157 flow [2024-11-27 20:08:26,458 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2024-11-27 20:08:26,464 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:08:26,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 109 events. 15/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 463 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2024-11-27 20:08:26,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 75 transitions, 157 flow [2024-11-27 20:08:26,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 75 transitions, 157 flow [2024-11-27 20:08:26,493 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:26,518 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;@7e108500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:26,518 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-27 20:08:26,532 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:08:26,532 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-27 20:08:26,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:08:26,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:26,533 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:26,536 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-27 20:08:26,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash 377785, now seen corresponding path program 1 times [2024-11-27 20:08:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:26,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412881822] [2024-11-27 20:08:26,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:26,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412881822] [2024-11-27 20:08:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412881822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:26,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:26,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021238695] [2024-11-27 20:08:26,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:26,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:27,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:27,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:27,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 75 [2024-11-27 20:08:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 75 [2024-11-27 20:08:27,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:27,459 INFO L124 PetriNetUnfolderBase]: 166/593 cut-off events. [2024-11-27 20:08:27,459 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:08:27,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 593 events. 166/593 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3433 event pairs, 143 based on Foata normal form. 100/641 useless extension candidates. Maximal degree in co-relation 914. Up to 326 conditions per place. [2024-11-27 20:08:27,468 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 39 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-27 20:08:27,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 235 flow [2024-11-27 20:08:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-27 20:08:27,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-27 20:08:27,493 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 157 flow. Second operand 3 states and 155 transitions. [2024-11-27 20:08:27,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 235 flow [2024-11-27 20:08:27,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 235 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:08:27,506 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 135 flow [2024-11-27 20:08:27,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-11-27 20:08:27,515 INFO L279 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-11-27 20:08:27,518 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 135 flow [2024-11-27 20:08:27,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:27,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:27,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:27,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:08:27,519 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-27 20:08:27,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash 377786, now seen corresponding path program 1 times [2024-11-27 20:08:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:27,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640453232] [2024-11-27 20:08:27,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640453232] [2024-11-27 20:08:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640453232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:27,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:27,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909690420] [2024-11-27 20:08:27,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:27,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:27,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:27,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:27,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-11-27 20:08:27,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:27,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:27,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-11-27 20:08:27,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:27,998 INFO L124 PetriNetUnfolderBase]: 154/543 cut-off events. [2024-11-27 20:08:27,998 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:08:28,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 543 events. 154/543 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3174 event pairs, 0 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 864. Up to 327 conditions per place. [2024-11-27 20:08:28,007 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 39 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-11-27 20:08:28,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 241 flow [2024-11-27 20:08:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-27 20:08:28,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-11-27 20:08:28,012 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 135 flow. Second operand 3 states and 148 transitions. [2024-11-27 20:08:28,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 241 flow [2024-11-27 20:08:28,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:08:28,017 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 141 flow [2024-11-27 20:08:28,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-27 20:08:28,020 INFO L279 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-27 20:08:28,020 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 141 flow [2024-11-27 20:08:28,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:28,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:28,021 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-27 20:08:28,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:08:28,021 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-27 20:08:28,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1011822553, now seen corresponding path program 1 times [2024-11-27 20:08:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:28,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237269127] [2024-11-27 20:08:28,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:28,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237269127] [2024-11-27 20:08:28,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237269127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:28,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:28,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:08:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985831072] [2024-11-27 20:08:28,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:28,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:28,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:28,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:28,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-11-27 20:08:28,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:28,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:28,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-11-27 20:08:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:28,693 INFO L124 PetriNetUnfolderBase]: 154/564 cut-off events. [2024-11-27 20:08:28,693 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-27 20:08:28,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 564 events. 154/564 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3209 event pairs, 100 based on Foata normal form. 12/527 useless extension candidates. Maximal degree in co-relation 909. Up to 258 conditions per place. [2024-11-27 20:08:28,699 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 60 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-11-27 20:08:28,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 335 flow [2024-11-27 20:08:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:08:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-27 20:08:28,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-11-27 20:08:28,703 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 141 flow. Second operand 5 states and 235 transitions. [2024-11-27 20:08:28,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 335 flow [2024-11-27 20:08:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:08:28,708 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 148 flow [2024-11-27 20:08:28,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-11-27 20:08:28,710 INFO L279 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2024-11-27 20:08:28,710 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 148 flow [2024-11-27 20:08:28,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:28,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:28,711 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-27 20:08:28,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:08:28,711 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-27 20:08:28,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1301728423, now seen corresponding path program 1 times [2024-11-27 20:08:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539289429] [2024-11-27 20:08:28,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:28,750 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:08:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:28,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:08:28,801 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:08:28,802 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-11-27 20:08:28,804 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-11-27 20:08:28,807 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-11-27 20:08:28,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-11-27 20:08:28,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-11-27 20:08:28,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-11-27 20:08:28,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:08:28,811 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-27 20:08:28,817 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:08:28,817 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-27 20:08:28,860 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:08:28,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 112 transitions, 240 flow [2024-11-27 20:08:28,887 INFO L124 PetriNetUnfolderBase]: 27/192 cut-off events. [2024-11-27 20:08:28,888 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:08:28,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 27/192 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 947 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2024-11-27 20:08:28,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 112 transitions, 240 flow [2024-11-27 20:08:28,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 112 transitions, 240 flow [2024-11-27 20:08:28,895 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:28,899 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;@7e108500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:28,899 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-27 20:08:28,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:08:28,901 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-27 20:08:28,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:08:28,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:28,901 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:28,901 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:28,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 489001, now seen corresponding path program 1 times [2024-11-27 20:08:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:28,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573647228] [2024-11-27 20:08:28,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:29,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:29,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573647228] [2024-11-27 20:08:29,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573647228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:29,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:29,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035471682] [2024-11-27 20:08:29,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:29,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:29,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:29,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:29,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:29,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 112 [2024-11-27 20:08:29,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:29,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:29,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 112 [2024-11-27 20:08:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:30,659 INFO L124 PetriNetUnfolderBase]: 4337/9506 cut-off events. [2024-11-27 20:08:30,659 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-27 20:08:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16495 conditions, 9506 events. 4337/9506 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 81818 event pairs, 3751 based on Foata normal form. 2040/10839 useless extension candidates. Maximal degree in co-relation 11454. Up to 6011 conditions per place. [2024-11-27 20:08:30,817 INFO L140 encePairwiseOnDemand]: 92/112 looper letters, 63 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-11-27 20:08:30,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 115 transitions, 376 flow [2024-11-27 20:08:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2024-11-27 20:08:30,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-11-27 20:08:30,825 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 240 flow. Second operand 3 states and 245 transitions. [2024-11-27 20:08:30,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 115 transitions, 376 flow [2024-11-27 20:08:30,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:08:30,831 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 206 flow [2024-11-27 20:08:30,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-11-27 20:08:30,832 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2024-11-27 20:08:30,833 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 206 flow [2024-11-27 20:08:30,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:30,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:30,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:30,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:08:30,836 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:30,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 489002, now seen corresponding path program 1 times [2024-11-27 20:08:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681311251] [2024-11-27 20:08:30,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:30,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:30,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681311251] [2024-11-27 20:08:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681311251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:30,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:30,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923437127] [2024-11-27 20:08:30,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:30,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:30,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:30,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:31,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 112 [2024-11-27 20:08:31,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:31,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:31,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 112 [2024-11-27 20:08:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:32,462 INFO L124 PetriNetUnfolderBase]: 4051/9339 cut-off events. [2024-11-27 20:08:32,462 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-11-27 20:08:32,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16043 conditions, 9339 events. 4051/9339 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 83152 event pairs, 1892 based on Foata normal form. 1/8573 useless extension candidates. Maximal degree in co-relation 13733. Up to 6452 conditions per place. [2024-11-27 20:08:32,551 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 53 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-11-27 20:08:32,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 346 flow [2024-11-27 20:08:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2024-11-27 20:08:32,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-27 20:08:32,553 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 206 flow. Second operand 3 states and 216 transitions. [2024-11-27 20:08:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 346 flow [2024-11-27 20:08:32,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:08:32,572 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 221 flow [2024-11-27 20:08:32,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2024-11-27 20:08:32,573 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2024-11-27 20:08:32,573 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 221 flow [2024-11-27 20:08:32,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:32,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:32,573 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-27 20:08:32,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:08:32,575 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:32,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash 647409478, now seen corresponding path program 1 times [2024-11-27 20:08:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:32,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285602083] [2024-11-27 20:08:32,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285602083] [2024-11-27 20:08:32,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285602083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:08:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941099431] [2024-11-27 20:08:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:32,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:32,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:32,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:32,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 112 [2024-11-27 20:08:32,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:32,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:32,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 112 [2024-11-27 20:08:32,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:34,124 INFO L124 PetriNetUnfolderBase]: 4051/9232 cut-off events. [2024-11-27 20:08:34,124 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2024-11-27 20:08:34,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16095 conditions, 9232 events. 4051/9232 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 82859 event pairs, 418 based on Foata normal form. 156/8872 useless extension candidates. Maximal degree in co-relation 14026. Up to 4883 conditions per place. [2024-11-27 20:08:34,179 INFO L140 encePairwiseOnDemand]: 107/112 looper letters, 95 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2024-11-27 20:08:34,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 533 flow [2024-11-27 20:08:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:08:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2024-11-27 20:08:34,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-11-27 20:08:34,182 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 221 flow. Second operand 5 states and 362 transitions. [2024-11-27 20:08:34,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 533 flow [2024-11-27 20:08:34,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:08:34,191 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 234 flow [2024-11-27 20:08:34,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-11-27 20:08:34,192 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 3 predicate places. [2024-11-27 20:08:34,195 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 234 flow [2024-11-27 20:08:34,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:34,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:34,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:34,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:08:34,196 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:34,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 622430665, now seen corresponding path program 1 times [2024-11-27 20:08:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671853285] [2024-11-27 20:08:34,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671853285] [2024-11-27 20:08:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671853285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:34,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347767571] [2024-11-27 20:08:34,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:34,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:34,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:34,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:34,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:34,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 112 [2024-11-27 20:08:34,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:34,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:34,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 112 [2024-11-27 20:08:34,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:35,284 INFO L124 PetriNetUnfolderBase]: 3775/8455 cut-off events. [2024-11-27 20:08:35,285 INFO L125 PetriNetUnfolderBase]: For 1569/1569 co-relation queries the response was YES. [2024-11-27 20:08:35,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 8455 events. 3775/8455 cut-off events. For 1569/1569 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 71900 event pairs, 3751 based on Foata normal form. 1/7921 useless extension candidates. Maximal degree in co-relation 14539. Up to 6012 conditions per place. [2024-11-27 20:08:35,332 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 52 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-11-27 20:08:35,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 105 transitions, 358 flow [2024-11-27 20:08:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-11-27 20:08:35,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-27 20:08:35,334 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 234 flow. Second operand 3 states and 217 transitions. [2024-11-27 20:08:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 105 transitions, 358 flow [2024-11-27 20:08:35,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 105 transitions, 348 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:08:35,338 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 222 flow [2024-11-27 20:08:35,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2024-11-27 20:08:35,340 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2024-11-27 20:08:35,340 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 222 flow [2024-11-27 20:08:35,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:35,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:35,340 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:35,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 20:08:35,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:35,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1863396123, now seen corresponding path program 1 times [2024-11-27 20:08:35,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:35,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963638489] [2024-11-27 20:08:35,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:35,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963638489] [2024-11-27 20:08:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963638489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:35,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:35,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:08:35,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939674080] [2024-11-27 20:08:35,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:35,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:08:35,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:35,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:08:35,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:08:35,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 112 [2024-11-27 20:08:35,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:35,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:35,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 112 [2024-11-27 20:08:35,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:36,531 INFO L124 PetriNetUnfolderBase]: 3675/8507 cut-off events. [2024-11-27 20:08:36,532 INFO L125 PetriNetUnfolderBase]: For 712/712 co-relation queries the response was YES. [2024-11-27 20:08:36,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15033 conditions, 8507 events. 3675/8507 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 74008 event pairs, 1629 based on Foata normal form. 0/7811 useless extension candidates. Maximal degree in co-relation 1254. Up to 5494 conditions per place. [2024-11-27 20:08:36,578 INFO L140 encePairwiseOnDemand]: 109/112 looper letters, 74 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2024-11-27 20:08:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 447 flow [2024-11-27 20:08:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:08:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:08:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2024-11-27 20:08:36,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-27 20:08:36,580 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 222 flow. Second operand 4 states and 294 transitions. [2024-11-27 20:08:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 447 flow [2024-11-27 20:08:36,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:08:36,585 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 228 flow [2024-11-27 20:08:36,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2024-11-27 20:08:36,589 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 4 predicate places. [2024-11-27 20:08:36,591 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 228 flow [2024-11-27 20:08:36,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:36,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:36,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:36,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:08:36,593 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:36,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1536746935, now seen corresponding path program 1 times [2024-11-27 20:08:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:36,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606978952] [2024-11-27 20:08:36,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:36,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:36,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:36,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606978952] [2024-11-27 20:08:36,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606978952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:36,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:36,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:36,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308456119] [2024-11-27 20:08:36,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:36,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:08:36,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:36,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:08:36,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:08:36,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 112 [2024-11-27 20:08:36,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:36,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:36,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 112 [2024-11-27 20:08:36,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:38,233 INFO L124 PetriNetUnfolderBase]: 4991/10668 cut-off events. [2024-11-27 20:08:38,233 INFO L125 PetriNetUnfolderBase]: For 1560/1560 co-relation queries the response was YES. [2024-11-27 20:08:38,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19959 conditions, 10668 events. 4991/10668 cut-off events. For 1560/1560 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 90558 event pairs, 3816 based on Foata normal form. 0/10196 useless extension candidates. Maximal degree in co-relation 14457. Up to 5806 conditions per place. [2024-11-27 20:08:38,293 INFO L140 encePairwiseOnDemand]: 94/112 looper letters, 88 selfloop transitions, 10 changer transitions 0/139 dead transitions. [2024-11-27 20:08:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 514 flow [2024-11-27 20:08:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:08:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:08:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 288 transitions. [2024-11-27 20:08:38,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-27 20:08:38,296 INFO L175 Difference]: Start difference. First operand has 103 places, 94 transitions, 228 flow. Second operand 4 states and 288 transitions. [2024-11-27 20:08:38,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 514 flow [2024-11-27 20:08:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 139 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:08:38,301 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 328 flow [2024-11-27 20:08:38,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-11-27 20:08:38,302 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 8 predicate places. [2024-11-27 20:08:38,303 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 328 flow [2024-11-27 20:08:38,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:38,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:38,304 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:38,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:08:38,305 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:38,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1536746934, now seen corresponding path program 1 times [2024-11-27 20:08:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943413125] [2024-11-27 20:08:38,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943413125] [2024-11-27 20:08:38,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943413125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241437074] [2024-11-27 20:08:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:38,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:38,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:38,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:38,574 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 112 [2024-11-27 20:08:38,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 328 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:38,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 112 [2024-11-27 20:08:38,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:39,410 INFO L124 PetriNetUnfolderBase]: 4182/8996 cut-off events. [2024-11-27 20:08:39,410 INFO L125 PetriNetUnfolderBase]: For 3557/3629 co-relation queries the response was YES. [2024-11-27 20:08:39,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19297 conditions, 8996 events. 4182/8996 cut-off events. For 3557/3629 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 74385 event pairs, 3942 based on Foata normal form. 1593/10250 useless extension candidates. Maximal degree in co-relation 15588. Up to 6770 conditions per place. [2024-11-27 20:08:39,441 INFO L140 encePairwiseOnDemand]: 103/112 looper letters, 50 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2024-11-27 20:08:39,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 414 flow [2024-11-27 20:08:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-27 20:08:39,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-11-27 20:08:39,443 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 328 flow. Second operand 3 states and 187 transitions. [2024-11-27 20:08:39,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 414 flow [2024-11-27 20:08:39,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:08:39,455 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 312 flow [2024-11-27 20:08:39,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2024-11-27 20:08:39,458 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2024-11-27 20:08:39,458 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 312 flow [2024-11-27 20:08:39,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:39,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:39,458 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-27 20:08:39,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 20:08:39,458 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-27 20:08:39,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1155437742, now seen corresponding path program 1 times [2024-11-27 20:08:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:39,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497468924] [2024-11-27 20:08:39,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:39,486 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:08:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:39,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:08:39,506 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-11-27 20:08:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-11-27 20:08:39,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-11-27 20:08:39,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-11-27 20:08:39,509 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-11-27 20:08:39,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 20:08:39,509 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:39,509 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:08:39,509 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-27 20:08:39,544 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:08:39,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 149 transitions, 325 flow [2024-11-27 20:08:39,576 INFO L124 PetriNetUnfolderBase]: 42/296 cut-off events. [2024-11-27 20:08:39,577 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-27 20:08:39,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 296 events. 42/296 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1528 event pairs, 1 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2024-11-27 20:08:39,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 149 transitions, 325 flow [2024-11-27 20:08:39,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 149 transitions, 325 flow [2024-11-27 20:08:39,583 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:39,584 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;@7e108500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:39,584 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-11-27 20:08:39,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:08:39,586 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-27 20:08:39,586 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:08:39,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:39,586 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:39,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-27 20:08:39,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:39,587 INFO L85 PathProgramCache]: Analyzing trace with hash 636958, now seen corresponding path program 1 times [2024-11-27 20:08:39,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:39,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652569321] [2024-11-27 20:08:39,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:39,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652569321] [2024-11-27 20:08:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652569321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481467133] [2024-11-27 20:08:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:39,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:39,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:39,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:39,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 149 [2024-11-27 20:08:39,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:39,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:39,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 149 [2024-11-27 20:08:39,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:08:53,354 INFO L124 PetriNetUnfolderBase]: 81925/144110 cut-off events. [2024-11-27 20:08:53,354 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2024-11-27 20:08:53,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259037 conditions, 144110 events. 81925/144110 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 3098. Compared 1477352 event pairs, 70588 based on Foata normal form. 34871/170170 useless extension candidates. Maximal degree in co-relation 134248. Up to 98253 conditions per place. [2024-11-27 20:08:54,029 INFO L140 encePairwiseOnDemand]: 123/149 looper letters, 87 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-11-27 20:08:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 519 flow [2024-11-27 20:08:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:08:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2024-11-27 20:08:54,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7494407158836689 [2024-11-27 20:08:54,031 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 325 flow. Second operand 3 states and 335 transitions. [2024-11-27 20:08:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 519 flow [2024-11-27 20:08:54,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 157 transitions, 519 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:08:54,036 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 279 flow [2024-11-27 20:08:54,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-11-27 20:08:54,037 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, -1 predicate places. [2024-11-27 20:08:54,037 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 279 flow [2024-11-27 20:08:54,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:54,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:08:54,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:08:54,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:08:54,038 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-27 20:08:54,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash 636959, now seen corresponding path program 1 times [2024-11-27 20:08:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182111094] [2024-11-27 20:08:54,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182111094] [2024-11-27 20:08:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182111094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:54,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:54,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:08:54,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441835081] [2024-11-27 20:08:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:54,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:54,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:54,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:54,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 149 [2024-11-27 20:08:54,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:54,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:08:54,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 149 [2024-11-27 20:08:54,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:05,884 INFO L124 PetriNetUnfolderBase]: 76347/138484 cut-off events. [2024-11-27 20:09:05,884 INFO L125 PetriNetUnfolderBase]: For 3814/3814 co-relation queries the response was YES. [2024-11-27 20:09:06,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247826 conditions, 138484 events. 76347/138484 cut-off events. For 3814/3814 co-relation queries the response was YES. Maximal size of possible extension queue 3122. Compared 1460988 event pairs, 49600 based on Foata normal form. 1/129226 useless extension candidates. Maximal degree in co-relation 210935. Up to 106004 conditions per place. [2024-11-27 20:09:06,578 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 66 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2024-11-27 20:09:06,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 137 transitions, 441 flow [2024-11-27 20:09:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2024-11-27 20:09:06,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6331096196868009 [2024-11-27 20:09:06,580 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 279 flow. Second operand 3 states and 283 transitions. [2024-11-27 20:09:06,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 137 transitions, 441 flow [2024-11-27 20:09:07,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 137 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:07,302 INFO L231 Difference]: Finished difference. Result has 131 places, 125 transitions, 289 flow [2024-11-27 20:09:07,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2024-11-27 20:09:07,303 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2024-11-27 20:09:07,303 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 289 flow [2024-11-27 20:09:07,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:07,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:07,304 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-27 20:09:07,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:09:07,304 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-27 20:09:07,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -144517896, now seen corresponding path program 1 times [2024-11-27 20:09:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:07,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758658434] [2024-11-27 20:09:07,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:07,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:07,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758658434] [2024-11-27 20:09:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758658434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:07,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394913697] [2024-11-27 20:09:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:07,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:07,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:07,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:07,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2024-11-27 20:09:07,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:07,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:07,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2024-11-27 20:09:07,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand