./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/02_inc_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 17:47:35,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 17:47:35,429 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 17:47:35,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 17:47:35,436 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 17:47:35,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 17:47:35,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 17:47:35,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 17:47:35,466 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 17:47:35,467 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 17:47:35,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 17:47:35,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 17:47:35,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 17:47:35,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 17:47:35,470 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 17:47:35,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 17:47:35,471 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 17:47:35,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 17:47:35,471 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 17:47:35,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 17:47:35,472 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 17:47:35,473 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 17:47:35,473 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 17:47:35,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 17:47:35,474 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 17:47:35,474 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 17:47:35,474 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 17:47:35,474 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 17:47:35,475 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 17:47:35,475 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 17:47:35,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 17:47:35,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 17:47:35,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 17:47:35,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:47:35,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 17:47:35,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 17:47:35,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 17:47:35,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 17:47:35,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 17:47:35,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 17:47:35,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 17:47:35,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 17:47:35,480 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 [2024-11-10 17:47:35,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 17:47:35,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 17:47:35,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 17:47:35,769 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 17:47:35,769 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 17:47:35,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/02_inc_cas.i [2024-11-10 17:47:37,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 17:47:37,481 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 17:47:37,482 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2024-11-10 17:47:37,500 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c958804b/cfdf99decdd041ef88120b07bab4b1f2/FLAG1436480f5 [2024-11-10 17:47:37,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c958804b/cfdf99decdd041ef88120b07bab4b1f2 [2024-11-10 17:47:37,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 17:47:37,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 17:47:37,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 17:47:37,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 17:47:37,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 17:47:37,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:47:37" (1/1) ... [2024-11-10 17:47:37,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5906d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:37, skipping insertion in model container [2024-11-10 17:47:37,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:47:37" (1/1) ... [2024-11-10 17:47:37,807 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 17:47:38,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:47:38,158 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 17:47:38,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 17:47:38,265 INFO L204 MainTranslator]: Completed translation [2024-11-10 17:47:38,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38 WrapperNode [2024-11-10 17:47:38,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 17:47:38,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 17:47:38,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 17:47:38,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 17:47:38,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,311 INFO L138 Inliner]: procedures = 170, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-11-10 17:47:38,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 17:47:38,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 17:47:38,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 17:47:38,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 17:47:38,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,354 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 3, 5]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 3 writes are split as follows [0, 2, 1]. [2024-11-10 17:47:38,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,360 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 17:47:38,371 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 17:47:38,371 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 17:47:38,371 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 17:47:38,374 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (1/1) ... [2024-11-10 17:47:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 17:47:38,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 17:47:38,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 17:47:38,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 17:47:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 17:47:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 17:47:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 17:47:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-10 17:47:38,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 17:47:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 17:47:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 17:47:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 17:47:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 17:47:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 17:47:38,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 17:47:38,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 17:47:38,459 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 17:47:38,580 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 17:47:38,582 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 17:47:38,737 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L717: havoc ~#casret~0#1.base, ~#casret~0#1.offset; [2024-11-10 17:47:38,741 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L717-1: SUMMARY for call ULTIMATE.dealloc(~#casret~0#1.base, ~#casret~0#1.offset); srcloc: null [2024-11-10 17:47:38,786 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 17:47:38,787 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 17:47:39,005 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 17:47:39,005 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 17:47:39,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:47:39 BoogieIcfgContainer [2024-11-10 17:47:39,005 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 17:47:39,011 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 17:47:39,011 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 17:47:39,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 17:47:39,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:47:37" (1/3) ... [2024-11-10 17:47:39,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3230177f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:47:39, skipping insertion in model container [2024-11-10 17:47:39,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:47:38" (2/3) ... [2024-11-10 17:47:39,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3230177f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:47:39, skipping insertion in model container [2024-11-10 17:47:39,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 05:47:39" (3/3) ... [2024-11-10 17:47:39,021 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2024-11-10 17:47:39,061 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 17:47:39,062 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-10 17:47:39,062 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 17:47:39,140 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:39,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 82 flow [2024-11-10 17:47:39,204 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2024-11-10 17:47:39,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:39,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 46 events. 5/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 129 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2024-11-10 17:47:39,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 39 transitions, 82 flow [2024-11-10 17:47:39,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 39 transitions, 82 flow [2024-11-10 17:47:39,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:39,238 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;@2f254c88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:39,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-11-10 17:47:39,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:39,244 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:39,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:39,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:39,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:39,246 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-10 17:47:39,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash 7432747, now seen corresponding path program 1 times [2024-11-10 17:47:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666723266] [2024-11-10 17:47:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:39,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666723266] [2024-11-10 17:47:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666723266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:39,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:39,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:39,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977886021] [2024-11-10 17:47:39,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:39,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:39,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-10 17:47:39,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:39,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:39,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-10 17:47:39,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:39,566 INFO L124 PetriNetUnfolderBase]: 42/119 cut-off events. [2024-11-10 17:47:39,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:39,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 119 events. 42/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 475 event pairs, 36 based on Foata normal form. 23/97 useless extension candidates. Maximal degree in co-relation 212. Up to 102 conditions per place. [2024-11-10 17:47:39,569 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 24 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-10 17:47:39,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 114 flow [2024-11-10 17:47:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 47 transitions. [2024-11-10 17:47:39,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-11-10 17:47:39,585 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 82 flow. Second operand 2 states and 47 transitions. [2024-11-10 17:47:39,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 114 flow [2024-11-10 17:47:39,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:39,589 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 66 flow [2024-11-10 17:47:39,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-10 17:47:39,595 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-10 17:47:39,595 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 66 flow [2024-11-10 17:47:39,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:39,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:39,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:39,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 17:47:39,596 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-10 17:47:39,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1954213630, now seen corresponding path program 1 times [2024-11-10 17:47:39,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36262716] [2024-11-10 17:47:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:39,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36262716] [2024-11-10 17:47:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36262716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:39,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:39,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 17:47:39,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348069931] [2024-11-10 17:47:39,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:39,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:39,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-10 17:47:39,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:39,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:39,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-10 17:47:39,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:39,929 INFO L124 PetriNetUnfolderBase]: 36/104 cut-off events. [2024-11-10 17:47:39,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 104 events. 36/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 384 event pairs, 28 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 78 conditions per place. [2024-11-10 17:47:39,934 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-10 17:47:39,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 110 flow [2024-11-10 17:47:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-11-10 17:47:39,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-11-10 17:47:39,936 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 66 flow. Second operand 3 states and 53 transitions. [2024-11-10 17:47:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 110 flow [2024-11-10 17:47:39,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:39,940 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 66 flow [2024-11-10 17:47:39,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-11-10 17:47:39,942 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2024-11-10 17:47:39,942 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 66 flow [2024-11-10 17:47:39,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:39,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:39,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:39,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 17:47:39,943 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-10 17:47:39,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1954213629, now seen corresponding path program 1 times [2024-11-10 17:47:39,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521155329] [2024-11-10 17:47:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:40,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:40,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521155329] [2024-11-10 17:47:40,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521155329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:40,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:40,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454920456] [2024-11-10 17:47:40,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:40,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:47:40,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:47:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:47:40,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-10 17:47:40,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:40,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:40,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-10 17:47:40,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:40,209 INFO L124 PetriNetUnfolderBase]: 30/89 cut-off events. [2024-11-10 17:47:40,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:40,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 89 events. 30/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 312 event pairs, 24 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 169. Up to 71 conditions per place. [2024-11-10 17:47:40,213 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-11-10 17:47:40,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 96 flow [2024-11-10 17:47:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-10 17:47:40,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-11-10 17:47:40,218 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 66 flow. Second operand 3 states and 48 transitions. [2024-11-10 17:47:40,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 96 flow [2024-11-10 17:47:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:47:40,220 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 56 flow [2024-11-10 17:47:40,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-10 17:47:40,221 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2024-11-10 17:47:40,221 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 56 flow [2024-11-10 17:47:40,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:40,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:40,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-10 17:47:40,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 17:47:40,222 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-11-10 17:47:40,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash -451619068, now seen corresponding path program 1 times [2024-11-10 17:47:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:40,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883866027] [2024-11-10 17:47:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:40,245 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 17:47:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:40,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 17:47:40,276 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 17:47:40,277 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-11-10 17:47:40,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-11-10 17:47:40,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-11-10 17:47:40,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-11-10 17:47:40,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-11-10 17:47:40,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (26 of 32 remaining) [2024-11-10 17:47:40,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-11-10 17:47:40,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-11-10 17:47:40,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-11-10 17:47:40,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2024-11-10 17:47:40,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2024-11-10 17:47:40,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-11-10 17:47:40,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2024-11-10 17:47:40,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2024-11-10 17:47:40,284 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-11-10 17:47:40,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-11-10 17:47:40,285 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-11-10 17:47:40,286 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-11-10 17:47:40,286 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-11-10 17:47:40,286 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-11-10 17:47:40,288 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-11-10 17:47:40,288 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 32 remaining) [2024-11-10 17:47:40,288 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-11-10 17:47:40,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-11-10 17:47:40,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-11-10 17:47:40,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2024-11-10 17:47:40,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2024-11-10 17:47:40,290 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-11-10 17:47:40,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2024-11-10 17:47:40,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2024-11-10 17:47:40,291 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-11-10 17:47:40,292 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-11-10 17:47:40,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 17:47:40,293 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 17:47:40,296 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 17:47:40,296 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 17:47:40,369 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 68 transitions, 146 flow [2024-11-10 17:47:40,396 INFO L124 PetriNetUnfolderBase]: 9/83 cut-off events. [2024-11-10 17:47:40,397 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 17:47:40,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 9/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 328 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-11-10 17:47:40,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 68 transitions, 146 flow [2024-11-10 17:47:40,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 68 transitions, 146 flow [2024-11-10 17:47:40,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:40,401 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;@2f254c88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:40,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-10 17:47:40,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:40,402 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:40,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:40,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:40,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:40,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:40,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 9526059, now seen corresponding path program 1 times [2024-11-10 17:47:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:40,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616107301] [2024-11-10 17:47:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616107301] [2024-11-10 17:47:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616107301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:40,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242527923] [2024-11-10 17:47:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:40,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:40,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 68 [2024-11-10 17:47:40,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:40,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:40,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 68 [2024-11-10 17:47:40,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:40,900 INFO L124 PetriNetUnfolderBase]: 1980/3434 cut-off events. [2024-11-10 17:47:40,900 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-10 17:47:40,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 3434 events. 1980/3434 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22502 event pairs, 1746 based on Foata normal form. 498/2240 useless extension candidates. Maximal degree in co-relation 4990. Up to 3123 conditions per place. [2024-11-10 17:47:40,928 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 45 selfloop transitions, 0 changer transitions 0/57 dead transitions. [2024-11-10 17:47:40,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 214 flow [2024-11-10 17:47:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 81 transitions. [2024-11-10 17:47:40,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-11-10 17:47:40,931 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 2 states and 81 transitions. [2024-11-10 17:47:40,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 214 flow [2024-11-10 17:47:40,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:40,933 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 124 flow [2024-11-10 17:47:40,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-11-10 17:47:40,936 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2024-11-10 17:47:40,937 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 124 flow [2024-11-10 17:47:40,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:40,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:40,937 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:40,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 17:47:40,937 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:40,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash 279031494, now seen corresponding path program 1 times [2024-11-10 17:47:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468789526] [2024-11-10 17:47:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468789526] [2024-11-10 17:47:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468789526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:41,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406170926] [2024-11-10 17:47:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:41,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:47:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:47:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:47:41,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 68 [2024-11-10 17:47:41,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:41,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:41,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 68 [2024-11-10 17:47:41,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:41,528 INFO L124 PetriNetUnfolderBase]: 1508/2756 cut-off events. [2024-11-10 17:47:41,529 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-10 17:47:41,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5239 conditions, 2756 events. 1508/2756 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18355 event pairs, 1078 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 5234. Up to 1893 conditions per place. [2024-11-10 17:47:41,549 INFO L140 encePairwiseOnDemand]: 41/68 looper letters, 91 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-11-10 17:47:41,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 128 transitions, 503 flow [2024-11-10 17:47:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:47:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:47:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2024-11-10 17:47:41,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-11-10 17:47:41,551 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 124 flow. Second operand 4 states and 184 transitions. [2024-11-10 17:47:41,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 128 transitions, 503 flow [2024-11-10 17:47:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 128 transitions, 503 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:41,554 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 336 flow [2024-11-10 17:47:41,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2024-11-10 17:47:41,555 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-10 17:47:41,555 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 336 flow [2024-11-10 17:47:41,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:41,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:41,557 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:41,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 17:47:41,557 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:41,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 279031495, now seen corresponding path program 1 times [2024-11-10 17:47:41,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:41,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467201131] [2024-11-10 17:47:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:41,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467201131] [2024-11-10 17:47:41,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467201131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:41,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:41,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280294959] [2024-11-10 17:47:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:41,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:47:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:47:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:47:41,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 68 [2024-11-10 17:47:41,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:41,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:41,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 68 [2024-11-10 17:47:41,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:42,015 INFO L124 PetriNetUnfolderBase]: 1034/1935 cut-off events. [2024-11-10 17:47:42,015 INFO L125 PetriNetUnfolderBase]: For 277/376 co-relation queries the response was YES. [2024-11-10 17:47:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1935 events. 1034/1935 cut-off events. For 277/376 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12054 event pairs, 682 based on Foata normal form. 255/1545 useless extension candidates. Maximal degree in co-relation 4760. Up to 1227 conditions per place. [2024-11-10 17:47:42,029 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 85 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2024-11-10 17:47:42,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 102 transitions, 595 flow [2024-11-10 17:47:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 17:47:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 17:47:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-10 17:47:42,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2024-11-10 17:47:42,031 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 336 flow. Second operand 4 states and 138 transitions. [2024-11-10 17:47:42,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 102 transitions, 595 flow [2024-11-10 17:47:42,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 102 transitions, 595 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:42,042 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 334 flow [2024-11-10 17:47:42,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2024-11-10 17:47:42,044 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-11-10 17:47:42,044 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 334 flow [2024-11-10 17:47:42,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:42,045 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:42,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 17:47:42,045 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:42,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1861305904, now seen corresponding path program 1 times [2024-11-10 17:47:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:42,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40430342] [2024-11-10 17:47:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:42,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40430342] [2024-11-10 17:47:42,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40430342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:42,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:42,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:42,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849776514] [2024-11-10 17:47:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:42,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:42,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:42,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 68 [2024-11-10 17:47:42,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:42,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 68 [2024-11-10 17:47:42,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:42,431 INFO L124 PetriNetUnfolderBase]: 888/1640 cut-off events. [2024-11-10 17:47:42,433 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-11-10 17:47:42,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4203 conditions, 1640 events. 888/1640 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9625 event pairs, 330 based on Foata normal form. 45/1211 useless extension candidates. Maximal degree in co-relation 4194. Up to 1119 conditions per place. [2024-11-10 17:47:42,446 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 69 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2024-11-10 17:47:42,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 531 flow [2024-11-10 17:47:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-10 17:47:42,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-10 17:47:42,448 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 334 flow. Second operand 3 states and 96 transitions. [2024-11-10 17:47:42,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 531 flow [2024-11-10 17:47:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 523 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:47:42,453 INFO L231 Difference]: Finished difference. Result has 59 places, 70 transitions, 320 flow [2024-11-10 17:47:42,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=70} [2024-11-10 17:47:42,453 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2024-11-10 17:47:42,454 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 70 transitions, 320 flow [2024-11-10 17:47:42,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:42,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:42,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 17:47:42,455 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:42,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1861305903, now seen corresponding path program 1 times [2024-11-10 17:47:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539004227] [2024-11-10 17:47:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:42,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:42,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539004227] [2024-11-10 17:47:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539004227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:42,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:42,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922032344] [2024-11-10 17:47:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:42,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:42,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:42,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 68 [2024-11-10 17:47:42,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 70 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:42,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 68 [2024-11-10 17:47:42,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:42,770 INFO L124 PetriNetUnfolderBase]: 851/1522 cut-off events. [2024-11-10 17:47:42,771 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-11-10 17:47:42,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 1522 events. 851/1522 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8870 event pairs, 126 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 4089. Up to 938 conditions per place. [2024-11-10 17:47:42,780 INFO L140 encePairwiseOnDemand]: 58/68 looper letters, 80 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-10 17:47:42,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 623 flow [2024-11-10 17:47:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-10 17:47:42,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5245098039215687 [2024-11-10 17:47:42,782 INFO L175 Difference]: Start difference. First operand has 59 places, 70 transitions, 320 flow. Second operand 3 states and 107 transitions. [2024-11-10 17:47:42,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 623 flow [2024-11-10 17:47:42,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 99 transitions, 605 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:47:42,788 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 396 flow [2024-11-10 17:47:42,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2024-11-10 17:47:42,790 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2024-11-10 17:47:42,790 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 396 flow [2024-11-10 17:47:42,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:42,791 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-10 17:47:42,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 17:47:42,791 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-10 17:47:42,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1158441117, now seen corresponding path program 1 times [2024-11-10 17:47:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477223815] [2024-11-10 17:47:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:42,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 17:47:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 17:47:42,810 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 17:47:42,810 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (41 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-11-10 17:47:42,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-11-10 17:47:42,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 47 remaining) [2024-11-10 17:47:42,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 47 remaining) [2024-11-10 17:47:42,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-11-10 17:47:42,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 47 remaining) [2024-11-10 17:47:42,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (25 of 47 remaining) [2024-11-10 17:47:42,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-11-10 17:47:42,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 47 remaining) [2024-11-10 17:47:42,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-11-10 17:47:42,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 47 remaining) [2024-11-10 17:47:42,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 47 remaining) [2024-11-10 17:47:42,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-11-10 17:47:42,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-11-10 17:47:42,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 17:47:42,818 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-10 17:47:42,819 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 17:47:42,819 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 17:47:42,885 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 17:47:42,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 212 flow [2024-11-10 17:47:42,905 INFO L124 PetriNetUnfolderBase]: 13/120 cut-off events. [2024-11-10 17:47:42,905 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-10 17:47:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 497 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2024-11-10 17:47:42,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 97 transitions, 212 flow [2024-11-10 17:47:42,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 97 transitions, 212 flow [2024-11-10 17:47:42,909 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 17:47:42,912 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;@2f254c88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 17:47:42,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-10 17:47:42,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 17:47:42,913 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 17:47:42,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 17:47:42,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:42,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 17:47:42,913 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:47:42,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash 12512107, now seen corresponding path program 1 times [2024-11-10 17:47:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721457432] [2024-11-10 17:47:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:42,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721457432] [2024-11-10 17:47:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721457432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:42,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648681995] [2024-11-10 17:47:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:42,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 17:47:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 17:47:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 17:47:42,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 97 [2024-11-10 17:47:42,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 212 flow. Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:42,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:42,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 97 [2024-11-10 17:47:42,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:50,860 INFO L124 PetriNetUnfolderBase]: 60462/88041 cut-off events. [2024-11-10 17:47:50,861 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-11-10 17:47:50,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171730 conditions, 88041 events. 60462/88041 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 4371. Compared 684592 event pairs, 53730 based on Foata normal form. 10606/51583 useless extension candidates. Maximal degree in co-relation 33484. Up to 82182 conditions per place. [2024-11-10 17:47:51,474 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 66 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2024-11-10 17:47:51,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 316 flow [2024-11-10 17:47:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 17:47:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 17:47:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 115 transitions. [2024-11-10 17:47:51,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5927835051546392 [2024-11-10 17:47:51,477 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 212 flow. Second operand 2 states and 115 transitions. [2024-11-10 17:47:51,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 316 flow [2024-11-10 17:47:51,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 314 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:51,481 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 182 flow [2024-11-10 17:47:51,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-11-10 17:47:51,483 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -9 predicate places. [2024-11-10 17:47:51,483 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 182 flow [2024-11-10 17:47:51,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:51,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:51,484 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:51,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 17:47:51,484 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:47:51,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -956995285, now seen corresponding path program 1 times [2024-11-10 17:47:51,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558485932] [2024-11-10 17:47:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:51,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:51,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558485932] [2024-11-10 17:47:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558485932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:51,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 17:47:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248522678] [2024-11-10 17:47:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:51,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:51,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:51,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 97 [2024-11-10 17:47:51,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:51,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:51,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 97 [2024-11-10 17:47:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:56,289 INFO L124 PetriNetUnfolderBase]: 38385/57788 cut-off events. [2024-11-10 17:47:56,289 INFO L125 PetriNetUnfolderBase]: For 968/968 co-relation queries the response was YES. [2024-11-10 17:47:56,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111057 conditions, 57788 events. 38385/57788 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 2889. Compared 453578 event pairs, 26389 based on Foata normal form. 0/30077 useless extension candidates. Maximal degree in co-relation 111051. Up to 39243 conditions per place. [2024-11-10 17:47:56,666 INFO L140 encePairwiseOnDemand]: 81/97 looper letters, 114 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2024-11-10 17:47:56,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 138 transitions, 544 flow [2024-11-10 17:47:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-10 17:47:56,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6426116838487973 [2024-11-10 17:47:56,668 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 182 flow. Second operand 3 states and 187 transitions. [2024-11-10 17:47:56,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 138 transitions, 544 flow [2024-11-10 17:47:56,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:47:56,675 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 245 flow [2024-11-10 17:47:56,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-11-10 17:47:56,677 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -6 predicate places. [2024-11-10 17:47:56,677 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 245 flow [2024-11-10 17:47:56,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:56,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:56,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:56,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 17:47:56,678 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:47:56,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash -956995284, now seen corresponding path program 1 times [2024-11-10 17:47:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175440617] [2024-11-10 17:47:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175440617] [2024-11-10 17:47:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175440617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:56,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:56,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704593465] [2024-11-10 17:47:56,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:56,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 17:47:56,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 17:47:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 17:47:56,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 97 [2024-11-10 17:47:56,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:56,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:56,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 97 [2024-11-10 17:47:56,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:47:59,589 INFO L124 PetriNetUnfolderBase]: 21591/32373 cut-off events. [2024-11-10 17:47:59,590 INFO L125 PetriNetUnfolderBase]: For 3061/3061 co-relation queries the response was YES. [2024-11-10 17:47:59,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69361 conditions, 32373 events. 21591/32373 cut-off events. For 3061/3061 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 229848 event pairs, 18138 based on Foata normal form. 0/20838 useless extension candidates. Maximal degree in co-relation 69353. Up to 29504 conditions per place. [2024-11-10 17:47:59,774 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 62 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-11-10 17:47:59,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 353 flow [2024-11-10 17:47:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:47:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:47:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-10 17:47:59,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.422680412371134 [2024-11-10 17:47:59,776 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 245 flow. Second operand 3 states and 123 transitions. [2024-11-10 17:47:59,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 353 flow [2024-11-10 17:47:59,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:47:59,801 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 222 flow [2024-11-10 17:47:59,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-11-10 17:47:59,802 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2024-11-10 17:47:59,802 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 222 flow [2024-11-10 17:47:59,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:59,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:47:59,803 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:47:59,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 17:47:59,803 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:47:59,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:47:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash -549451914, now seen corresponding path program 1 times [2024-11-10 17:47:59,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:47:59,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512688528] [2024-11-10 17:47:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:47:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:47:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:47:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:47:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:47:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512688528] [2024-11-10 17:47:59,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512688528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:47:59,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:47:59,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:47:59,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094576291] [2024-11-10 17:47:59,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:47:59,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:47:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:47:59,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:47:59,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:47:59,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 97 [2024-11-10 17:47:59,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:47:59,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:47:59,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 97 [2024-11-10 17:47:59,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:02,734 INFO L124 PetriNetUnfolderBase]: 22911/33835 cut-off events. [2024-11-10 17:48:02,735 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-11-10 17:48:02,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71157 conditions, 33835 events. 22911/33835 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 1582. Compared 246420 event pairs, 4717 based on Foata normal form. 0/23872 useless extension candidates. Maximal degree in co-relation 71149. Up to 21002 conditions per place. [2024-11-10 17:48:02,933 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 107 selfloop transitions, 15 changer transitions 0/137 dead transitions. [2024-11-10 17:48:02,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 137 transitions, 628 flow [2024-11-10 17:48:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:48:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:48:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-10 17:48:02,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.570446735395189 [2024-11-10 17:48:02,935 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 222 flow. Second operand 3 states and 166 transitions. [2024-11-10 17:48:02,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 137 transitions, 628 flow [2024-11-10 17:48:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 627 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 17:48:02,941 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 355 flow [2024-11-10 17:48:02,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-11-10 17:48:02,942 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -11 predicate places. [2024-11-10 17:48:02,942 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 355 flow [2024-11-10 17:48:02,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:02,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:02,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:02,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 17:48:02,943 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:48:02,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -549451915, now seen corresponding path program 1 times [2024-11-10 17:48:03,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:03,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121721996] [2024-11-10 17:48:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:03,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121721996] [2024-11-10 17:48:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121721996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:03,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:03,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:48:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944888294] [2024-11-10 17:48:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:03,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:48:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:48:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:48:03,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 97 [2024-11-10 17:48:03,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:03,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:03,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 97 [2024-11-10 17:48:03,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:05,483 INFO L124 PetriNetUnfolderBase]: 17934/27155 cut-off events. [2024-11-10 17:48:05,483 INFO L125 PetriNetUnfolderBase]: For 13354/13354 co-relation queries the response was YES. [2024-11-10 17:48:05,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65381 conditions, 27155 events. 17934/27155 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 197791 event pairs, 3092 based on Foata normal form. 1326/21737 useless extension candidates. Maximal degree in co-relation 65372. Up to 19630 conditions per place. [2024-11-10 17:48:05,637 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 103 selfloop transitions, 7 changer transitions 0/127 dead transitions. [2024-11-10 17:48:05,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 683 flow [2024-11-10 17:48:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:48:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:48:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-11-10 17:48:05,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5154639175257731 [2024-11-10 17:48:05,638 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 355 flow. Second operand 3 states and 150 transitions. [2024-11-10 17:48:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 683 flow [2024-11-10 17:48:05,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 653 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:48:05,665 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 333 flow [2024-11-10 17:48:05,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-11-10 17:48:05,666 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2024-11-10 17:48:05,666 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 333 flow [2024-11-10 17:48:05,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:05,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:05,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:05,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 17:48:05,667 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:48:05,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -601107345, now seen corresponding path program 1 times [2024-11-10 17:48:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:05,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133871482] [2024-11-10 17:48:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 17:48:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133871482] [2024-11-10 17:48:06,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133871482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:06,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 17:48:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284342421] [2024-11-10 17:48:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:06,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 17:48:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 17:48:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 17:48:06,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 97 [2024-11-10 17:48:06,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:06,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:06,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 97 [2024-11-10 17:48:06,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:10,879 INFO L124 PetriNetUnfolderBase]: 34064/52130 cut-off events. [2024-11-10 17:48:10,879 INFO L125 PetriNetUnfolderBase]: For 19178/19235 co-relation queries the response was YES. [2024-11-10 17:48:10,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119698 conditions, 52130 events. 34064/52130 cut-off events. For 19178/19235 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 412388 event pairs, 6626 based on Foata normal form. 3/38501 useless extension candidates. Maximal degree in co-relation 119689. Up to 22363 conditions per place. [2024-11-10 17:48:11,184 INFO L140 encePairwiseOnDemand]: 83/97 looper letters, 243 selfloop transitions, 28 changer transitions 0/286 dead transitions. [2024-11-10 17:48:11,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 286 transitions, 1577 flow [2024-11-10 17:48:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 17:48:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 17:48:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 327 transitions. [2024-11-10 17:48:11,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5618556701030928 [2024-11-10 17:48:11,186 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 333 flow. Second operand 6 states and 327 transitions. [2024-11-10 17:48:11,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 286 transitions, 1577 flow [2024-11-10 17:48:11,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 286 transitions, 1557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 17:48:11,329 INFO L231 Difference]: Finished difference. Result has 86 places, 119 transitions, 505 flow [2024-11-10 17:48:11,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=505, PETRI_PLACES=86, PETRI_TRANSITIONS=119} [2024-11-10 17:48:11,330 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -8 predicate places. [2024-11-10 17:48:11,330 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 119 transitions, 505 flow [2024-11-10 17:48:11,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:11,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:11,330 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:11,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 17:48:11,331 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:48:11,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash -847845772, now seen corresponding path program 1 times [2024-11-10 17:48:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262098994] [2024-11-10 17:48:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:11,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 17:48:11,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262098994] [2024-11-10 17:48:11,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262098994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:11,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:11,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:48:11,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273525988] [2024-11-10 17:48:11,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:11,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:48:11,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:48:11,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:48:11,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 97 [2024-11-10 17:48:11,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:11,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:11,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 97 [2024-11-10 17:48:11,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 17:48:14,890 INFO L124 PetriNetUnfolderBase]: 28165/43136 cut-off events. [2024-11-10 17:48:14,890 INFO L125 PetriNetUnfolderBase]: For 21234/21573 co-relation queries the response was YES. [2024-11-10 17:48:15,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110691 conditions, 43136 events. 28165/43136 cut-off events. For 21234/21573 co-relation queries the response was YES. Maximal size of possible extension queue 1932. Compared 333769 event pairs, 9286 based on Foata normal form. 1143/36568 useless extension candidates. Maximal degree in co-relation 110679. Up to 29373 conditions per place. [2024-11-10 17:48:15,371 INFO L140 encePairwiseOnDemand]: 91/97 looper letters, 145 selfloop transitions, 9 changer transitions 0/172 dead transitions. [2024-11-10 17:48:15,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 172 transitions, 1052 flow [2024-11-10 17:48:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 17:48:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 17:48:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-10 17:48:15,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49828178694158076 [2024-11-10 17:48:15,372 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 505 flow. Second operand 3 states and 145 transitions. [2024-11-10 17:48:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 172 transitions, 1052 flow [2024-11-10 17:48:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 172 transitions, 1052 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 17:48:15,421 INFO L231 Difference]: Finished difference. Result has 85 places, 112 transitions, 496 flow [2024-11-10 17:48:15,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=496, PETRI_PLACES=85, PETRI_TRANSITIONS=112} [2024-11-10 17:48:15,422 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -9 predicate places. [2024-11-10 17:48:15,422 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 112 transitions, 496 flow [2024-11-10 17:48:15,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:15,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 17:48:15,422 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 17:48:15,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 17:48:15,422 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-10 17:48:15,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 17:48:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash -847845773, now seen corresponding path program 1 times [2024-11-10 17:48:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 17:48:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113529881] [2024-11-10 17:48:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 17:48:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 17:48:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 17:48:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 17:48:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 17:48:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113529881] [2024-11-10 17:48:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113529881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 17:48:15,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 17:48:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 17:48:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794052453] [2024-11-10 17:48:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 17:48:15,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 17:48:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 17:48:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 17:48:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 17:48:15,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 97 [2024-11-10 17:48:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 112 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 17:48:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 17:48:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 97 [2024-11-10 17:48:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand