./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.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 eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:22:37,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:22:37,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:22:37,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:22:37,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:22:37,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:22:37,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:22:37,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:22:37,710 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:22:37,711 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:22:37,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:22:37,711 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:22:37,712 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:22:37,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:22:37,727 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:22:37,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:22:37,727 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:22:37,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:22:37,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:22:37,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:22:37,728 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:22:37,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:22:37,730 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:22:37,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:22:37,730 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:22:37,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:22:37,731 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:22:37,731 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:22:37,731 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:22:37,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:22:37,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:22:37,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:22:37,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:22:37,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:22:37,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:22:37,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:22:37,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:22:37,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 [2024-10-14 19:22:37,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:22:37,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:22:37,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:22:37,953 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:22:37,953 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:22:37,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i [2024-10-14 19:22:39,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:22:39,472 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:22:39,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i [2024-10-14 19:22:39,511 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8becb7eea/95b9ddb2d43e46458dada590490a96fa/FLAG4b4a74878 [2024-10-14 19:22:39,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8becb7eea/95b9ddb2d43e46458dada590490a96fa [2024-10-14 19:22:39,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:22:39,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:22:39,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:22:39,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:22:39,535 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:22:39,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:22:39" (1/1) ... [2024-10-14 19:22:39,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43847dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:39, skipping insertion in model container [2024-10-14 19:22:39,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:22:39" (1/1) ... [2024-10-14 19:22:39,583 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:22:39,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:22:40,000 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:22:40,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:22:40,121 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:22:40,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40 WrapperNode [2024-10-14 19:22:40,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:22:40,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:22:40,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:22:40,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:22:40,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,175 INFO L138 Inliner]: procedures = 372, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2024-10-14 19:22:40,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:22:40,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:22:40,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:22:40,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:22:40,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,191 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,212 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-14 19:22:40,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,225 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:22:40,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:22:40,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:22:40,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:22:40,237 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (1/1) ... [2024-10-14 19:22:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:22:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:40,268 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) [2024-10-14 19:22:40,270 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 [2024-10-14 19:22:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:22:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 19:22:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 19:22:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2024-10-14 19:22:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 19:22:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2024-10-14 19:22:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 19:22:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:22:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:22:40,319 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:22:40,438 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:22:40,441 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:22:40,690 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:22:40,691 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:22:40,800 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:22:40,804 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:22:40,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:22:40 BoogieIcfgContainer [2024-10-14 19:22:40,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:22:40,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:22:40,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:22:40,812 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:22:40,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:22:39" (1/3) ... [2024-10-14 19:22:40,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674bbc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:22:40, skipping insertion in model container [2024-10-14 19:22:40,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:22:40" (2/3) ... [2024-10-14 19:22:40,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674bbc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:22:40, skipping insertion in model container [2024-10-14 19:22:40,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:22:40" (3/3) ... [2024-10-14 19:22:40,816 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2024-10-14 19:22:40,832 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:22:40,832 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-14 19:22:40,832 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:22:40,890 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-14 19:22:40,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 59 transitions, 138 flow [2024-10-14 19:22:40,967 INFO L124 PetriNetUnfolderBase]: 14/137 cut-off events. [2024-10-14 19:22:40,968 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:22:40,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 14/137 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 669 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2024-10-14 19:22:40,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 59 transitions, 138 flow [2024-10-14 19:22:40,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 59 transitions, 138 flow [2024-10-14 19:22:40,984 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:22:40,990 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;@21bfe165, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:22:40,991 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-14 19:22:40,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:22:40,996 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-14 19:22:40,996 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:22:40,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:40,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-14 19:22:40,997 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:41,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 11896378, now seen corresponding path program 1 times [2024-10-14 19:22:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292213745] [2024-10-14 19:22:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292213745] [2024-10-14 19:22:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292213745] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:41,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:41,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:22:41,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271356654] [2024-10-14 19:22:41,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:41,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:22:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:22:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:22:41,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-10-14 19:22:41,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 138 flow. Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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) [2024-10-14 19:22:41,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:41,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-10-14 19:22:41,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:41,344 INFO L124 PetriNetUnfolderBase]: 86/377 cut-off events. [2024-10-14 19:22:41,344 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-14 19:22:41,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 377 events. 86/377 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2581 event pairs, 71 based on Foata normal form. 44/295 useless extension candidates. Maximal degree in co-relation 375. Up to 190 conditions per place. [2024-10-14 19:22:41,351 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 24 selfloop transitions, 0 changer transitions 0/53 dead transitions. [2024-10-14 19:22:41,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 174 flow [2024-10-14 19:22:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:22:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:22:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 87 transitions. [2024-10-14 19:22:41,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7372881355932204 [2024-10-14 19:22:41,366 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 138 flow. Second operand 2 states and 87 transitions. [2024-10-14 19:22:41,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 174 flow [2024-10-14 19:22:41,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:22:41,375 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 126 flow [2024-10-14 19:22:41,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-10-14 19:22:41,385 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2024-10-14 19:22:41,386 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 126 flow [2024-10-14 19:22:41,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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) [2024-10-14 19:22:41,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:41,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:22:41,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 19:22:41,386 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:41,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash 368786992, now seen corresponding path program 1 times [2024-10-14 19:22:41,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:41,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402976652] [2024-10-14 19:22:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402976652] [2024-10-14 19:22:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402976652] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:41,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:41,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:22:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681840726] [2024-10-14 19:22:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:41,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:22:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:22:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:22:41,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-14 19:22:41,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-14 19:22:41,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:41,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-14 19:22:41,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:41,690 INFO L124 PetriNetUnfolderBase]: 97/370 cut-off events. [2024-10-14 19:22:41,690 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-14 19:22:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 370 events. 97/370 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2474 event pairs, 65 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 607. Up to 168 conditions per place. [2024-10-14 19:22:41,694 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-10-14 19:22:41,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 186 flow [2024-10-14 19:22:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:22:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:22:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-14 19:22:41,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5988700564971752 [2024-10-14 19:22:41,697 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 126 flow. Second operand 3 states and 106 transitions. [2024-10-14 19:22:41,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 186 flow [2024-10-14 19:22:41,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:22:41,700 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 126 flow [2024-10-14 19:22:41,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-10-14 19:22:41,701 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2024-10-14 19:22:41,701 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 126 flow [2024-10-14 19:22:41,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-14 19:22:41,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:41,701 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:22:41,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 19:22:41,702 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:41,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 368786993, now seen corresponding path program 1 times [2024-10-14 19:22:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:41,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879356376] [2024-10-14 19:22:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:41,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:41,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:41,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879356376] [2024-10-14 19:22:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879356376] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:41,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:22:41,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696391124] [2024-10-14 19:22:41,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:41,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:22:41,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:22:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:22:41,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-10-14 19:22:41,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:22:41,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:41,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-10-14 19:22:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:42,211 INFO L124 PetriNetUnfolderBase]: 184/699 cut-off events. [2024-10-14 19:22:42,212 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-10-14 19:22:42,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 699 events. 184/699 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5573 event pairs, 124 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1174. Up to 215 conditions per place. [2024-10-14 19:22:42,216 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 47 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-10-14 19:22:42,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 300 flow [2024-10-14 19:22:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:22:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:22:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-10-14 19:22:42,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6822033898305084 [2024-10-14 19:22:42,219 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 126 flow. Second operand 4 states and 161 transitions. [2024-10-14 19:22:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 300 flow [2024-10-14 19:22:42,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:42,227 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 148 flow [2024-10-14 19:22:42,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-10-14 19:22:42,228 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2024-10-14 19:22:42,228 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 148 flow [2024-10-14 19:22:42,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:22:42,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:42,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:42,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 19:22:42,229 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:42,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 39828972, now seen corresponding path program 1 times [2024-10-14 19:22:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:42,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321157651] [2024-10-14 19:22:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:42,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321157651] [2024-10-14 19:22:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321157651] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:42,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:42,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:22:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255791305] [2024-10-14 19:22:42,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:42,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:22:42,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:22:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:22:42,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-10-14 19:22:42,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-14 19:22:42,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:42,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-10-14 19:22:42,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:42,560 INFO L124 PetriNetUnfolderBase]: 226/748 cut-off events. [2024-10-14 19:22:42,561 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-14 19:22:42,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 748 events. 226/748 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6029 event pairs, 182 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 1317. Up to 488 conditions per place. [2024-10-14 19:22:42,565 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 36 selfloop transitions, 7 changer transitions 2/67 dead transitions. [2024-10-14 19:22:42,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 271 flow [2024-10-14 19:22:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:22:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:22:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-10-14 19:22:42,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597457627118644 [2024-10-14 19:22:42,568 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 148 flow. Second operand 4 states and 141 transitions. [2024-10-14 19:22:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 271 flow [2024-10-14 19:22:42,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:22:42,570 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 186 flow [2024-10-14 19:22:42,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-10-14 19:22:42,572 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-10-14 19:22:42,572 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 186 flow [2024-10-14 19:22:42,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-14 19:22:42,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:42,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:42,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 19:22:42,574 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:42,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1234699897, now seen corresponding path program 1 times [2024-10-14 19:22:42,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:42,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715044758] [2024-10-14 19:22:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:42,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715044758] [2024-10-14 19:22:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715044758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:22:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197814386] [2024-10-14 19:22:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:42,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:22:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:22:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:22:42,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-14 19:22:42,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-14 19:22:42,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:42,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-14 19:22:42,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:42,707 INFO L124 PetriNetUnfolderBase]: 200/675 cut-off events. [2024-10-14 19:22:42,707 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-10-14 19:22:42,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 675 events. 200/675 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5279 event pairs, 136 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 1292. Up to 349 conditions per place. [2024-10-14 19:22:42,710 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 30 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-10-14 19:22:42,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 256 flow [2024-10-14 19:22:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:22:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:22:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-14 19:22:42,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5988700564971752 [2024-10-14 19:22:42,711 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 186 flow. Second operand 3 states and 106 transitions. [2024-10-14 19:22:42,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 256 flow [2024-10-14 19:22:42,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 245 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:42,713 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 179 flow [2024-10-14 19:22:42,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-10-14 19:22:42,714 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-10-14 19:22:42,714 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 179 flow [2024-10-14 19:22:42,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-14 19:22:42,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:42,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:42,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 19:22:42,715 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:42,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1234699898, now seen corresponding path program 1 times [2024-10-14 19:22:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:42,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622769942] [2024-10-14 19:22:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:42,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:42,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622769942] [2024-10-14 19:22:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622769942] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:42,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:42,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:22:42,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272196012] [2024-10-14 19:22:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:42,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:22:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:22:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:22:42,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-10-14 19:22:42,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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) [2024-10-14 19:22:42,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:42,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-10-14 19:22:42,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:43,026 INFO L124 PetriNetUnfolderBase]: 271/784 cut-off events. [2024-10-14 19:22:43,026 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-14 19:22:43,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 784 events. 271/784 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6058 event pairs, 54 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 1602. Up to 238 conditions per place. [2024-10-14 19:22:43,034 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 41 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-10-14 19:22:43,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 357 flow [2024-10-14 19:22:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:22:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:22:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 175 transitions. [2024-10-14 19:22:43,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5932203389830508 [2024-10-14 19:22:43,035 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 179 flow. Second operand 5 states and 175 transitions. [2024-10-14 19:22:43,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 357 flow [2024-10-14 19:22:43,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:43,039 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 268 flow [2024-10-14 19:22:43,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-10-14 19:22:43,039 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-10-14 19:22:43,039 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 268 flow [2024-10-14 19:22:43,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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) [2024-10-14 19:22:43,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:43,040 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:43,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 19:22:43,040 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:43,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash 226424391, now seen corresponding path program 1 times [2024-10-14 19:22:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845972575] [2024-10-14 19:22:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:43,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:43,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845972575] [2024-10-14 19:22:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845972575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:22:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335430140] [2024-10-14 19:22:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:43,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:43,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:43,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:22:43,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 19:22:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:43,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:22:43,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:22:43,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:22:43,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-14 19:22:43,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 19:22:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:43,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:22:43,543 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 19:22:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335430140] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:22:43,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:22:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-14 19:22:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195018019] [2024-10-14 19:22:43,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:22:43,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 19:22:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 19:22:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-14 19:22:43,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-14 19:22:43,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 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) [2024-10-14 19:22:43,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:43,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-14 19:22:43,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:43,877 INFO L124 PetriNetUnfolderBase]: 126/429 cut-off events. [2024-10-14 19:22:43,877 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-10-14 19:22:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 429 events. 126/429 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2793 event pairs, 59 based on Foata normal form. 4/384 useless extension candidates. Maximal degree in co-relation 1031. Up to 233 conditions per place. [2024-10-14 19:22:43,880 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 41 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-10-14 19:22:43,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 396 flow [2024-10-14 19:22:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:22:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:22:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-10-14 19:22:43,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5423728813559322 [2024-10-14 19:22:43,881 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 268 flow. Second operand 6 states and 192 transitions. [2024-10-14 19:22:43,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 396 flow [2024-10-14 19:22:43,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:22:43,884 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 297 flow [2024-10-14 19:22:43,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-10-14 19:22:43,885 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-10-14 19:22:43,885 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 297 flow [2024-10-14 19:22:43,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 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) [2024-10-14 19:22:43,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:43,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:43,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 19:22:44,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:44,090 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-14 19:22:44,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1570778131, now seen corresponding path program 1 times [2024-10-14 19:22:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909013024] [2024-10-14 19:22:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:22:44,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:22:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:22:44,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:22:44,123 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:22:44,124 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-10-14 19:22:44,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2024-10-14 19:22:44,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-10-14 19:22:44,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (11 of 15 remaining) [2024-10-14 19:22:44,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 15 remaining) [2024-10-14 19:22:44,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-10-14 19:22:44,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 19:22:44,127 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:44,129 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:22:44,129 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 19:22:44,145 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-14 19:22:44,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 80 transitions, 204 flow [2024-10-14 19:22:44,165 INFO L124 PetriNetUnfolderBase]: 71/450 cut-off events. [2024-10-14 19:22:44,165 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2024-10-14 19:22:44,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 450 events. 71/450 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2750 event pairs, 1 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 276. Up to 32 conditions per place. [2024-10-14 19:22:44,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 80 transitions, 204 flow [2024-10-14 19:22:44,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 80 transitions, 204 flow [2024-10-14 19:22:44,169 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:22:44,170 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;@21bfe165, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:22:44,170 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-14 19:22:44,171 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:22:44,171 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-14 19:22:44,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:22:44,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:44,172 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-14 19:22:44,172 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:44,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 14297530, now seen corresponding path program 1 times [2024-10-14 19:22:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:44,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432490102] [2024-10-14 19:22:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:44,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:44,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432490102] [2024-10-14 19:22:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432490102] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:44,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:44,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:22:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611177787] [2024-10-14 19:22:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:44,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:22:44,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:22:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:22:44,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-10-14 19:22:44,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2024-10-14 19:22:44,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:44,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-10-14 19:22:44,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:44,544 INFO L124 PetriNetUnfolderBase]: 1996/4913 cut-off events. [2024-10-14 19:22:44,545 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-10-14 19:22:44,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 4913 events. 1996/4913 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46904 event pairs, 1718 based on Foata normal form. 1035/4803 useless extension candidates. Maximal degree in co-relation 3153. Up to 3077 conditions per place. [2024-10-14 19:22:44,568 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 33 selfloop transitions, 0 changer transitions 0/71 dead transitions. [2024-10-14 19:22:44,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 252 flow [2024-10-14 19:22:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:22:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:22:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 116 transitions. [2024-10-14 19:22:44,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-10-14 19:22:44,570 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 204 flow. Second operand 2 states and 116 transitions. [2024-10-14 19:22:44,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 252 flow [2024-10-14 19:22:44,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:22:44,572 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 186 flow [2024-10-14 19:22:44,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-10-14 19:22:44,573 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-10-14 19:22:44,573 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 186 flow [2024-10-14 19:22:44,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2024-10-14 19:22:44,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:44,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:22:44,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 19:22:44,573 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:44,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 443222782, now seen corresponding path program 1 times [2024-10-14 19:22:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864844439] [2024-10-14 19:22:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:44,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:44,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864844439] [2024-10-14 19:22:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864844439] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:44,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:22:44,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206114651] [2024-10-14 19:22:44,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:44,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:22:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:22:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:22:44,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-14 19:22:44,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-10-14 19:22:44,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:44,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-14 19:22:44,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:45,034 INFO L124 PetriNetUnfolderBase]: 2241/4944 cut-off events. [2024-10-14 19:22:45,034 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2024-10-14 19:22:45,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 4944 events. 2241/4944 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 44568 event pairs, 1564 based on Foata normal form. 0/4098 useless extension candidates. Maximal degree in co-relation 8837. Up to 2701 conditions per place. [2024-10-14 19:22:45,067 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 39 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-14 19:22:45,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 276 flow [2024-10-14 19:22:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:22:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:22:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-14 19:22:45,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-14 19:22:45,068 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 186 flow. Second operand 3 states and 145 transitions. [2024-10-14 19:22:45,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 276 flow [2024-10-14 19:22:45,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:22:45,070 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 186 flow [2024-10-14 19:22:45,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-10-14 19:22:45,071 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-10-14 19:22:45,072 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 186 flow [2024-10-14 19:22:45,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-10-14 19:22:45,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:45,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:22:45,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 19:22:45,073 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:45,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash 443222783, now seen corresponding path program 1 times [2024-10-14 19:22:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:45,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813440998] [2024-10-14 19:22:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813440998] [2024-10-14 19:22:45,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813440998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:45,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:45,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:22:45,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218834278] [2024-10-14 19:22:45,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:45,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:22:45,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:22:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:22:45,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 80 [2024-10-14 19:22:45,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-14 19:22:45,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:45,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 80 [2024-10-14 19:22:45,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:45,863 INFO L124 PetriNetUnfolderBase]: 4433/9850 cut-off events. [2024-10-14 19:22:45,864 INFO L125 PetriNetUnfolderBase]: For 2286/2286 co-relation queries the response was YES. [2024-10-14 19:22:45,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 9850 events. 4433/9850 cut-off events. For 2286/2286 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 100432 event pairs, 3894 based on Foata normal form. 1/8186 useless extension candidates. Maximal degree in co-relation 17826. Up to 3472 conditions per place. [2024-10-14 19:22:45,912 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 66 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2024-10-14 19:22:45,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 440 flow [2024-10-14 19:22:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:22:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:22:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-10-14 19:22:45,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-14 19:22:45,914 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 186 flow. Second operand 4 states and 216 transitions. [2024-10-14 19:22:45,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 440 flow [2024-10-14 19:22:45,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 104 transitions, 432 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:45,924 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 208 flow [2024-10-14 19:22:45,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-10-14 19:22:45,924 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2024-10-14 19:22:45,924 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 208 flow [2024-10-14 19:22:45,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-14 19:22:45,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:45,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:45,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 19:22:45,925 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:45,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1353401580, now seen corresponding path program 1 times [2024-10-14 19:22:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98551124] [2024-10-14 19:22:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:46,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98551124] [2024-10-14 19:22:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98551124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:46,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:46,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:22:46,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172859941] [2024-10-14 19:22:46,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:46,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:22:46,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:22:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:22:46,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-14 19:22:46,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-10-14 19:22:46,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:46,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-14 19:22:46,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:47,006 INFO L124 PetriNetUnfolderBase]: 5403/10829 cut-off events. [2024-10-14 19:22:47,006 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2024-10-14 19:22:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20133 conditions, 10829 events. 5403/10829 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 106068 event pairs, 4876 based on Foata normal form. 1/8444 useless extension candidates. Maximal degree in co-relation 20123. Up to 8400 conditions per place. [2024-10-14 19:22:47,052 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 46 selfloop transitions, 7 changer transitions 2/86 dead transitions. [2024-10-14 19:22:47,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 355 flow [2024-10-14 19:22:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:22:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:22:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 187 transitions. [2024-10-14 19:22:47,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-10-14 19:22:47,053 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 208 flow. Second operand 4 states and 187 transitions. [2024-10-14 19:22:47,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 355 flow [2024-10-14 19:22:47,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:22:47,056 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 252 flow [2024-10-14 19:22:47,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-10-14 19:22:47,057 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2024-10-14 19:22:47,057 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 252 flow [2024-10-14 19:22:47,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-10-14 19:22:47,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:47,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:47,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 19:22:47,057 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:47,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash -994222137, now seen corresponding path program 1 times [2024-10-14 19:22:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562690228] [2024-10-14 19:22:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:47,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:47,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562690228] [2024-10-14 19:22:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562690228] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:47,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:22:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120571068] [2024-10-14 19:22:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:47,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:22:47,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:22:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:22:47,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-14 19:22:47,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-10-14 19:22:47,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:47,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-14 19:22:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:47,792 INFO L124 PetriNetUnfolderBase]: 4735/9573 cut-off events. [2024-10-14 19:22:47,792 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2024-10-14 19:22:47,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18847 conditions, 9573 events. 4735/9573 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 91386 event pairs, 3414 based on Foata normal form. 0/8840 useless extension candidates. Maximal degree in co-relation 18835. Up to 5776 conditions per place. [2024-10-14 19:22:47,848 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 43 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-10-14 19:22:47,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 354 flow [2024-10-14 19:22:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:22:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:22:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-14 19:22:47,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-14 19:22:47,850 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 252 flow. Second operand 3 states and 145 transitions. [2024-10-14 19:22:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 354 flow [2024-10-14 19:22:47,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 346 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:22:47,856 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 248 flow [2024-10-14 19:22:47,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-10-14 19:22:47,857 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-10-14 19:22:47,858 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 248 flow [2024-10-14 19:22:47,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-10-14 19:22:47,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:47,859 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:47,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 19:22:47,859 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:47,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash -994222136, now seen corresponding path program 1 times [2024-10-14 19:22:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:47,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801740449] [2024-10-14 19:22:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801740449] [2024-10-14 19:22:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801740449] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:22:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625223411] [2024-10-14 19:22:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:47,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:22:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:22:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:22:47,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-14 19:22:47,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 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) [2024-10-14 19:22:47,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:47,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-14 19:22:47,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:48,975 INFO L124 PetriNetUnfolderBase]: 7410/13329 cut-off events. [2024-10-14 19:22:48,976 INFO L125 PetriNetUnfolderBase]: For 2811/2811 co-relation queries the response was YES. [2024-10-14 19:22:49,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 13329 events. 7410/13329 cut-off events. For 2811/2811 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 121675 event pairs, 1446 based on Foata normal form. 0/12087 useless extension candidates. Maximal degree in co-relation 27558. Up to 5622 conditions per place. [2024-10-14 19:22:49,059 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 65 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-10-14 19:22:49,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 516 flow [2024-10-14 19:22:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:22:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:22:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-10-14 19:22:49,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-10-14 19:22:49,061 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 248 flow. Second operand 5 states and 244 transitions. [2024-10-14 19:22:49,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 516 flow [2024-10-14 19:22:49,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 506 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:49,084 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 343 flow [2024-10-14 19:22:49,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-10-14 19:22:49,084 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-10-14 19:22:49,085 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 343 flow [2024-10-14 19:22:49,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 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) [2024-10-14 19:22:49,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:49,085 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:49,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 19:22:49,085 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:49,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2002050778, now seen corresponding path program 1 times [2024-10-14 19:22:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:49,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056004011] [2024-10-14 19:22:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:49,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:49,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056004011] [2024-10-14 19:22:49,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056004011] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:22:49,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877527858] [2024-10-14 19:22:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:49,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:22:49,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 19:22:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:49,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:22:49,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:22:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:22:49,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-14 19:22:49,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 19:22:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:49,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:22:49,476 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 19:22:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877527858] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:22:49,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:22:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-14 19:22:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689303723] [2024-10-14 19:22:49,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:22:49,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 19:22:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:49,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 19:22:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-14 19:22:49,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-14 19:22:49,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 343 flow. Second operand has 13 states, 13 states have (on average 35.84615384615385) internal successors, (466), 13 states have internal predecessors, (466), 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) [2024-10-14 19:22:49,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:49,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-14 19:22:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:50,712 INFO L124 PetriNetUnfolderBase]: 5864/11634 cut-off events. [2024-10-14 19:22:50,712 INFO L125 PetriNetUnfolderBase]: For 3647/3647 co-relation queries the response was YES. [2024-10-14 19:22:50,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27258 conditions, 11634 events. 5864/11634 cut-off events. For 3647/3647 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 113435 event pairs, 3861 based on Foata normal form. 4/10824 useless extension candidates. Maximal degree in co-relation 27243. Up to 3919 conditions per place. [2024-10-14 19:22:50,808 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 98 selfloop transitions, 16 changer transitions 0/145 dead transitions. [2024-10-14 19:22:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 145 transitions, 809 flow [2024-10-14 19:22:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:22:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:22:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 403 transitions. [2024-10-14 19:22:50,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5597222222222222 [2024-10-14 19:22:50,814 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 343 flow. Second operand 9 states and 403 transitions. [2024-10-14 19:22:50,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 145 transitions, 809 flow [2024-10-14 19:22:50,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 802 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:22:50,823 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 423 flow [2024-10-14 19:22:50,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2024-10-14 19:22:50,823 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 18 predicate places. [2024-10-14 19:22:50,824 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 423 flow [2024-10-14 19:22:50,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.84615384615385) internal successors, (466), 13 states have internal predecessors, (466), 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) [2024-10-14 19:22:50,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:50,824 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:50,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 19:22:51,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 19:22:51,029 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:51,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1964725272, now seen corresponding path program 1 times [2024-10-14 19:22:51,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:51,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059806227] [2024-10-14 19:22:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:51,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:51,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059806227] [2024-10-14 19:22:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059806227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:51,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:22:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443956253] [2024-10-14 19:22:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:51,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:22:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:22:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:22:51,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2024-10-14 19:22:51,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 423 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:22:51,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:51,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2024-10-14 19:22:51,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:51,805 INFO L124 PetriNetUnfolderBase]: 4679/10161 cut-off events. [2024-10-14 19:22:51,805 INFO L125 PetriNetUnfolderBase]: For 5430/5430 co-relation queries the response was YES. [2024-10-14 19:22:51,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 10161 events. 4679/10161 cut-off events. For 5430/5430 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 100855 event pairs, 3262 based on Foata normal form. 0/9772 useless extension candidates. Maximal degree in co-relation 24252. Up to 5414 conditions per place. [2024-10-14 19:22:51,868 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 51 selfloop transitions, 5 changer transitions 1/94 dead transitions. [2024-10-14 19:22:51,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 94 transitions, 547 flow [2024-10-14 19:22:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:22:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:22:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-10-14 19:22:51,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-10-14 19:22:51,870 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 423 flow. Second operand 4 states and 188 transitions. [2024-10-14 19:22:51,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 94 transitions, 547 flow [2024-10-14 19:22:51,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 533 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-14 19:22:51,881 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 411 flow [2024-10-14 19:22:51,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2024-10-14 19:22:51,881 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 18 predicate places. [2024-10-14 19:22:51,881 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 411 flow [2024-10-14 19:22:51,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:22:51,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:51,882 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:51,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 19:22:51,882 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:51,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -818766701, now seen corresponding path program 1 times [2024-10-14 19:22:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773591547] [2024-10-14 19:22:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773591547] [2024-10-14 19:22:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773591547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:22:52,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098612043] [2024-10-14 19:22:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:52,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:52,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:52,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:22:52,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 19:22:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:52,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 19:22:52,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:22:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:22:52,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-10-14 19:22:52,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 19:22:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:52,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:22:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098612043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:22:52,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:22:52,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-14 19:22:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82621530] [2024-10-14 19:22:52,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:22:52,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:22:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:22:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:22:52,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-14 19:22:52,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 411 flow. Second operand has 14 states, 14 states have (on average 34.714285714285715) internal successors, (486), 14 states have internal predecessors, (486), 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) [2024-10-14 19:22:52,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:52,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-14 19:22:52,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:53,835 INFO L124 PetriNetUnfolderBase]: 5885/11133 cut-off events. [2024-10-14 19:22:53,835 INFO L125 PetriNetUnfolderBase]: For 5474/5474 co-relation queries the response was YES. [2024-10-14 19:22:53,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27781 conditions, 11133 events. 5885/11133 cut-off events. For 5474/5474 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 103519 event pairs, 1901 based on Foata normal form. 368/11118 useless extension candidates. Maximal degree in co-relation 27763. Up to 3259 conditions per place. [2024-10-14 19:22:53,925 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 84 selfloop transitions, 27 changer transitions 1/141 dead transitions. [2024-10-14 19:22:53,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 833 flow [2024-10-14 19:22:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 19:22:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 19:22:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 335 transitions. [2024-10-14 19:22:53,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-10-14 19:22:53,928 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 411 flow. Second operand 7 states and 335 transitions. [2024-10-14 19:22:53,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 833 flow [2024-10-14 19:22:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 815 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 19:22:53,974 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 475 flow [2024-10-14 19:22:53,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=475, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-10-14 19:22:53,975 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 19 predicate places. [2024-10-14 19:22:53,975 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 475 flow [2024-10-14 19:22:53,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.714285714285715) internal successors, (486), 14 states have internal predecessors, (486), 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) [2024-10-14 19:22:53,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:53,976 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:53,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 19:22:54,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:54,179 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:54,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1690652247, now seen corresponding path program 1 times [2024-10-14 19:22:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:54,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760631203] [2024-10-14 19:22:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760631203] [2024-10-14 19:22:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760631203] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:22:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496242843] [2024-10-14 19:22:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:54,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:22:54,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 19:22:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:54,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:22:54,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:22:54,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-14 19:22:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:22:54,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 19:22:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:54,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:22:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:54,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496242843] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:22:54,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:22:54,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-10-14 19:22:54,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799367255] [2024-10-14 19:22:54,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:22:54,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 19:22:54,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 19:22:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-10-14 19:22:54,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-14 19:22:54,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 475 flow. Second operand has 16 states, 16 states have (on average 34.6875) internal successors, (555), 16 states have internal predecessors, (555), 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) [2024-10-14 19:22:54,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:54,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-14 19:22:54,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:56,415 INFO L124 PetriNetUnfolderBase]: 6951/12139 cut-off events. [2024-10-14 19:22:56,416 INFO L125 PetriNetUnfolderBase]: For 6625/6625 co-relation queries the response was YES. [2024-10-14 19:22:56,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31650 conditions, 12139 events. 6951/12139 cut-off events. For 6625/6625 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 109066 event pairs, 548 based on Foata normal form. 355/12203 useless extension candidates. Maximal degree in co-relation 31632. Up to 4060 conditions per place. [2024-10-14 19:22:56,501 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 76 selfloop transitions, 26 changer transitions 13/146 dead transitions. [2024-10-14 19:22:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 895 flow [2024-10-14 19:22:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:22:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:22:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 401 transitions. [2024-10-14 19:22:56,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5569444444444445 [2024-10-14 19:22:56,506 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 475 flow. Second operand 9 states and 401 transitions. [2024-10-14 19:22:56,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 895 flow [2024-10-14 19:22:56,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 849 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-14 19:22:56,523 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 490 flow [2024-10-14 19:22:56,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2024-10-14 19:22:56,524 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 23 predicate places. [2024-10-14 19:22:56,524 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 490 flow [2024-10-14 19:22:56,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 34.6875) internal successors, (555), 16 states have internal predecessors, (555), 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) [2024-10-14 19:22:56,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:56,524 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:56,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 19:22:56,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 19:22:56,725 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -743323899, now seen corresponding path program 1 times [2024-10-14 19:22:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061693380] [2024-10-14 19:22:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:56,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061693380] [2024-10-14 19:22:56,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061693380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:22:56,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273960182] [2024-10-14 19:22:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:56,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:22:56,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 19:22:56,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 19:22:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:56,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:22:56,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:22:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:56,885 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:22:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273960182] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 19:22:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-10-14 19:22:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971238253] [2024-10-14 19:22:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:56,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:22:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:22:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-14 19:22:56,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2024-10-14 19:22:56,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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) [2024-10-14 19:22:56,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:56,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2024-10-14 19:22:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:22:57,728 INFO L124 PetriNetUnfolderBase]: 5657/10791 cut-off events. [2024-10-14 19:22:57,728 INFO L125 PetriNetUnfolderBase]: For 9363/9363 co-relation queries the response was YES. [2024-10-14 19:22:57,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 10791 events. 5657/10791 cut-off events. For 9363/9363 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 102027 event pairs, 3376 based on Foata normal form. 48/10472 useless extension candidates. Maximal degree in co-relation 29323. Up to 4620 conditions per place. [2024-10-14 19:22:57,804 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 109 selfloop transitions, 19 changer transitions 0/159 dead transitions. [2024-10-14 19:22:57,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1070 flow [2024-10-14 19:22:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:22:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:22:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-10-14 19:22:57,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2024-10-14 19:22:57,805 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 490 flow. Second operand 6 states and 335 transitions. [2024-10-14 19:22:57,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1070 flow [2024-10-14 19:22:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 159 transitions, 971 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-10-14 19:22:57,833 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 573 flow [2024-10-14 19:22:57,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-10-14 19:22:57,834 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 25 predicate places. [2024-10-14 19:22:57,834 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 573 flow [2024-10-14 19:22:57,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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) [2024-10-14 19:22:57,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:22:57,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:22:57,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 19:22:58,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:22:58,035 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:22:58,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:22:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash 592633522, now seen corresponding path program 1 times [2024-10-14 19:22:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:22:58,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762186026] [2024-10-14 19:22:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:22:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:22:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:22:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:22:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:22:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762186026] [2024-10-14 19:22:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762186026] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:22:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:22:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:22:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797388360] [2024-10-14 19:22:58,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:22:58,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:22:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:22:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:22:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:22:58,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 80 [2024-10-14 19:22:58,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 573 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-14 19:22:58,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:22:58,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 80 [2024-10-14 19:22:58,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:03,607 INFO L124 PetriNetUnfolderBase]: 47550/76295 cut-off events. [2024-10-14 19:23:03,607 INFO L125 PetriNetUnfolderBase]: For 97190/97190 co-relation queries the response was YES. [2024-10-14 19:23:03,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196584 conditions, 76295 events. 47550/76295 cut-off events. For 97190/97190 co-relation queries the response was YES. Maximal size of possible extension queue 4220. Compared 714265 event pairs, 15780 based on Foata normal form. 0/74475 useless extension candidates. Maximal degree in co-relation 196566. Up to 41834 conditions per place. [2024-10-14 19:23:04,080 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 266 selfloop transitions, 14 changer transitions 25/332 dead transitions. [2024-10-14 19:23:04,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 332 transitions, 2785 flow [2024-10-14 19:23:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:23:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:23:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 413 transitions. [2024-10-14 19:23:04,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6453125 [2024-10-14 19:23:04,082 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 573 flow. Second operand 8 states and 413 transitions. [2024-10-14 19:23:04,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 332 transitions, 2785 flow [2024-10-14 19:23:04,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 332 transitions, 2775 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:04,391 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 674 flow [2024-10-14 19:23:04,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2024-10-14 19:23:04,392 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 37 predicate places. [2024-10-14 19:23:04,392 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 674 flow [2024-10-14 19:23:04,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-14 19:23:04,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:04,392 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:04,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-14 19:23:04,393 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-14 19:23:04,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 664758200, now seen corresponding path program 1 times [2024-10-14 19:23:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724915259] [2024-10-14 19:23:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:23:04,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 19:23:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 19:23:04,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 19:23:04,518 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 19:23:04,518 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-14 19:23:04,518 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-14 19:23:04,519 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-14 19:23:04,520 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2024-10-14 19:23:04,520 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2024-10-14 19:23:04,520 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-14 19:23:04,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-14 19:23:04,520 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:04,521 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 19:23:04,521 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-14 19:23:04,554 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-10-14 19:23:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 101 transitions, 274 flow [2024-10-14 19:23:04,639 INFO L124 PetriNetUnfolderBase]: 362/1567 cut-off events. [2024-10-14 19:23:04,640 INFO L125 PetriNetUnfolderBase]: For 419/435 co-relation queries the response was YES. [2024-10-14 19:23:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1567 events. 362/1567 cut-off events. For 419/435 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11709 event pairs, 32 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 1009. Up to 192 conditions per place. [2024-10-14 19:23:04,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 101 transitions, 274 flow [2024-10-14 19:23:04,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 101 transitions, 274 flow [2024-10-14 19:23:04,653 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:23:04,653 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;@21bfe165, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:23:04,653 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-14 19:23:04,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:23:04,655 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-14 19:23:04,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:23:04,655 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:04,655 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-14 19:23:04,655 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-14 19:23:04,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 17345146, now seen corresponding path program 1 times [2024-10-14 19:23:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732918715] [2024-10-14 19:23:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732918715] [2024-10-14 19:23:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732918715] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:04,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:23:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652554209] [2024-10-14 19:23:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:04,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 19:23:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 19:23:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 19:23:04,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-10-14 19:23:04,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2024-10-14 19:23:04,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:04,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-10-14 19:23:04,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:09,700 INFO L124 PetriNetUnfolderBase]: 34066/64837 cut-off events. [2024-10-14 19:23:09,700 INFO L125 PetriNetUnfolderBase]: For 20374/20374 co-relation queries the response was YES. [2024-10-14 19:23:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117455 conditions, 64837 events. 34066/64837 cut-off events. For 20374/20374 co-relation queries the response was YES. Maximal size of possible extension queue 2942. Compared 714379 event pairs, 29642 based on Foata normal form. 17554/71783 useless extension candidates. Maximal degree in co-relation 37009. Up to 45834 conditions per place. [2024-10-14 19:23:10,085 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 42 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2024-10-14 19:23:10,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 334 flow [2024-10-14 19:23:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 19:23:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 19:23:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 145 transitions. [2024-10-14 19:23:10,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7178217821782178 [2024-10-14 19:23:10,087 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 274 flow. Second operand 2 states and 145 transitions. [2024-10-14 19:23:10,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 334 flow [2024-10-14 19:23:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:23:10,092 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 250 flow [2024-10-14 19:23:10,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=250, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-10-14 19:23:10,092 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2024-10-14 19:23:10,093 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 250 flow [2024-10-14 19:23:10,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2024-10-14 19:23:10,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:10,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:23:10,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-14 19:23:10,093 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-14 19:23:10,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 537698977, now seen corresponding path program 1 times [2024-10-14 19:23:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:10,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627092979] [2024-10-14 19:23:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:10,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627092979] [2024-10-14 19:23:10,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627092979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:10,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:10,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:23:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063404981] [2024-10-14 19:23:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:10,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:10,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:23:10,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 101 [2024-10-14 19:23:10,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2024-10-14 19:23:10,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 101 [2024-10-14 19:23:10,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:15,075 INFO L124 PetriNetUnfolderBase]: 38403/67431 cut-off events. [2024-10-14 19:23:15,075 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2024-10-14 19:23:15,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126130 conditions, 67431 events. 38403/67431 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 694389 event pairs, 25339 based on Foata normal form. 0/60302 useless extension candidates. Maximal degree in co-relation 126121. Up to 39814 conditions per place. [2024-10-14 19:23:15,523 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 51 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-14 19:23:15,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 96 transitions, 370 flow [2024-10-14 19:23:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2024-10-14 19:23:15,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6072607260726073 [2024-10-14 19:23:15,525 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 250 flow. Second operand 3 states and 184 transitions. [2024-10-14 19:23:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 96 transitions, 370 flow [2024-10-14 19:23:15,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:23:15,535 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 250 flow [2024-10-14 19:23:15,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-10-14 19:23:15,535 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2024-10-14 19:23:15,536 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 250 flow [2024-10-14 19:23:15,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2024-10-14 19:23:15,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:15,536 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 19:23:15,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-14 19:23:15,536 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-14 19:23:15,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash 537698978, now seen corresponding path program 1 times [2024-10-14 19:23:15,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:15,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483266936] [2024-10-14 19:23:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483266936] [2024-10-14 19:23:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483266936] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:15,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:15,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512307524] [2024-10-14 19:23:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:15,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:23:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:23:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:23:15,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 101 [2024-10-14 19:23:15,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:15,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:15,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 101 [2024-10-14 19:23:15,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:26,343 INFO L124 PetriNetUnfolderBase]: 76586/134293 cut-off events. [2024-10-14 19:23:26,343 INFO L125 PetriNetUnfolderBase]: For 40604/40604 co-relation queries the response was YES. [2024-10-14 19:23:26,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254753 conditions, 134293 events. 76586/134293 cut-off events. For 40604/40604 co-relation queries the response was YES. Maximal size of possible extension queue 6140. Compared 1488967 event pairs, 67803 based on Foata normal form. 1/119906 useless extension candidates. Maximal degree in co-relation 254743. Up to 51913 conditions per place. [2024-10-14 19:23:27,374 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 84 selfloop transitions, 4 changer transitions 0/131 dead transitions. [2024-10-14 19:23:27,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 584 flow [2024-10-14 19:23:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:23:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:23:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2024-10-14 19:23:27,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6683168316831684 [2024-10-14 19:23:27,375 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 250 flow. Second operand 4 states and 270 transitions. [2024-10-14 19:23:27,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 584 flow