./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/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:22:57,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:22:57,213 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:22:57,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:22:57,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:22:57,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:22:57,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:22:57,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:22:57,261 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:22:57,261 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:22:57,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:22:57,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:22:57,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:22:57,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:22:57,265 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:22:57,265 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:22:57,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:22:57,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:22:57,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:22:57,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:22:57,267 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:22:57,270 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:22:57,271 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:22:57,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:22:57,271 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:22:57,271 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:22:57,272 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:22:57,272 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:22:57,272 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:22:57,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:22:57,273 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:22:57,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:22:57,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:22:57,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:22:57,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:22:57,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:22:57,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:22:57,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:22:57,276 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:22:57,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:22:57,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:22:57,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:22:57,277 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-10-11 19:22:57,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:22:57,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:22:57,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:22:57,575 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:22:57,576 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:22:57,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-11 19:22:59,001 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:22:59,269 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:22:59,269 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-11 19:22:59,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6fa71d1f4/a91cbcab211d4fc4a80ac0cb12d24392/FLAGa5fb4d720 [2024-10-11 19:22:59,581 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6fa71d1f4/a91cbcab211d4fc4a80ac0cb12d24392 [2024-10-11 19:22:59,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:22:59,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:22:59,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:22:59,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:22:59,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:22:59,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:22:59" (1/1) ... [2024-10-11 19:22:59,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f765528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:22:59, skipping insertion in model container [2024-10-11 19:22:59,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:22:59" (1/1) ... [2024-10-11 19:22:59,644 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:23:00,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:23:00,050 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:23:00,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:23:00,174 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:23:00,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00 WrapperNode [2024-10-11 19:23:00,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:23:00,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:23:00,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:23:00,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:23:00,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,222 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-10-11 19:23:00,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:23:00,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:23:00,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:23:00,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:23:00,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,252 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 2, 9]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 1 writes are split as follows [0, 1, 0]. [2024-10-11 19:23:00,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,264 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,268 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:23:00,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:23:00,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:23:00,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:23:00,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (1/1) ... [2024-10-11 19:23:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:23:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:00,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:23:00,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:23:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-11 19:23:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-11 19:23:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-10-11 19:23:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:23:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:23:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:23:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:23:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:23:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:23:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:23:00,356 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:23:00,473 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:23:00,475 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:23:00,645 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:23:00,645 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:23:00,778 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:23:00,779 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 19:23:00,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:23:00 BoogieIcfgContainer [2024-10-11 19:23:00,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:23:00,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:23:00,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:23:00,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:23:00,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:22:59" (1/3) ... [2024-10-11 19:23:00,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1056df3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:23:00, skipping insertion in model container [2024-10-11 19:23:00,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:00" (2/3) ... [2024-10-11 19:23:00,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1056df3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:23:00, skipping insertion in model container [2024-10-11 19:23:00,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:23:00" (3/3) ... [2024-10-11 19:23:00,789 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-10-11 19:23:00,807 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:23:00,808 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-11 19:23:00,808 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:23:00,869 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:23:00,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2024-10-11 19:23:00,924 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2024-10-11 19:23:00,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:00,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-10-11 19:23:00,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2024-10-11 19:23:00,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2024-10-11 19:23:00,942 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:23:00,952 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;@6144e7ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:23:00,953 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-11 19:23:00,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:23:00,961 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-11 19:23:00,961 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:00,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:00,963 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:00,963 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:00,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1745696950, now seen corresponding path program 1 times [2024-10-11 19:23:00,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270729615] [2024-10-11 19:23:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:01,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270729615] [2024-10-11 19:23:01,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270729615] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:01,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:01,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436728515] [2024-10-11 19:23:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:01,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:23:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:23:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:23:01,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-10-11 19:23:01,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-10-11 19:23:01,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:01,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-10-11 19:23:01,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:01,645 INFO L124 PetriNetUnfolderBase]: 11/60 cut-off events. [2024-10-11 19:23:01,646 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:01,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 60 events. 11/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 3 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 84. Up to 24 conditions per place. [2024-10-11 19:23:01,648 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 19 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-10-11 19:23:01,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 134 flow [2024-10-11 19:23:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-10-11 19:23:01,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-10-11 19:23:01,661 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 103 transitions. [2024-10-11 19:23:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 134 flow [2024-10-11 19:23:01,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:23:01,665 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2024-10-11 19:23:01,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-11 19:23:01,670 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:01,670 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2024-10-11 19:23:01,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-10-11 19:23:01,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:01,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:01,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:23:01,671 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:01,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1717969130, now seen corresponding path program 1 times [2024-10-11 19:23:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763509552] [2024-10-11 19:23:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763509552] [2024-10-11 19:23:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763509552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651833964] [2024-10-11 19:23:01,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:01,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:23:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:23:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:23:01,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-11 19:23:01,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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) [2024-10-11 19:23:01,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:01,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-11 19:23:01,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:02,102 INFO L124 PetriNetUnfolderBase]: 16/76 cut-off events. [2024-10-11 19:23:02,104 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:23:02,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 76 events. 16/76 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 7 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 53. Up to 40 conditions per place. [2024-10-11 19:23:02,106 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 22 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-10-11 19:23:02,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 148 flow [2024-10-11 19:23:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-11 19:23:02,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-10-11 19:23:02,109 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 108 transitions. [2024-10-11 19:23:02,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 148 flow [2024-10-11 19:23:02,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 140 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:02,112 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2024-10-11 19:23:02,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-11 19:23:02,113 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-10-11 19:23:02,113 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2024-10-11 19:23:02,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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) [2024-10-11 19:23:02,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:02,114 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:02,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:23:02,114 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:02,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1717435208, now seen corresponding path program 1 times [2024-10-11 19:23:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:02,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438862583] [2024-10-11 19:23:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:02,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:02,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:02,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438862583] [2024-10-11 19:23:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438862583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:02,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429148459] [2024-10-11 19:23:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:02,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:02,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-11 19:23:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-11 19:23:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:02,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-11 19:23:02,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:02,309 INFO L124 PetriNetUnfolderBase]: 15/77 cut-off events. [2024-10-11 19:23:02,310 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 19:23:02,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2024-10-11 19:23:02,311 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-11 19:23:02,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2024-10-11 19:23:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-10-11 19:23:02,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-11 19:23:02,316 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2024-10-11 19:23:02,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2024-10-11 19:23:02,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:23:02,317 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2024-10-11 19:23:02,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-11 19:23:02,320 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:02,320 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2024-10-11 19:23:02,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-11 19:23:02,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:02,321 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:02,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:23:02,322 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:02,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash -850989204, now seen corresponding path program 1 times [2024-10-11 19:23:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656313366] [2024-10-11 19:23:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:02,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656313366] [2024-10-11 19:23:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656313366] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:02,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:02,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658368657] [2024-10-11 19:23:02,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:02,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:02,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-11 19:23:02,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:02,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:02,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-11 19:23:02,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:02,599 INFO L124 PetriNetUnfolderBase]: 14/66 cut-off events. [2024-10-11 19:23:02,599 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 19:23:02,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2024-10-11 19:23:02,600 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-11 19:23:02,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2024-10-11 19:23:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-11 19:23:02,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-11 19:23:02,602 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2024-10-11 19:23:02,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2024-10-11 19:23:02,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:02,604 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2024-10-11 19:23:02,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-11 19:23:02,605 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:02,605 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2024-10-11 19:23:02,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:02,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:02,606 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:02,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:23:02,606 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:02,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:02,607 INFO L85 PathProgramCache]: Analyzing trace with hash -391476111, now seen corresponding path program 1 times [2024-10-11 19:23:02,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:02,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419524769] [2024-10-11 19:23:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:02,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:02,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:02,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419524769] [2024-10-11 19:23:02,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419524769] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:02,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980814843] [2024-10-11 19:23:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:02,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:02,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:02,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:23:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:02,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:23:02,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:02,993 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 19:23:02,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-11 19:23:03,023 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:23:03,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 19:23:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:03,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:03,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980814843] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:03,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:03,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 19:23:03,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130135772] [2024-10-11 19:23:03,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:03,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:23:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:23:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:23:03,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-11 19:23:03,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 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) [2024-10-11 19:23:03,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-11 19:23:03,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:03,878 INFO L124 PetriNetUnfolderBase]: 33/126 cut-off events. [2024-10-11 19:23:03,879 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-11 19:23:03,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 126 events. 33/126 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 6 based on Foata normal form. 12/135 useless extension candidates. Maximal degree in co-relation 95. Up to 38 conditions per place. [2024-10-11 19:23:03,880 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 32 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2024-10-11 19:23:03,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 233 flow [2024-10-11 19:23:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:23:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:23:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-10-11 19:23:03,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-10-11 19:23:03,883 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 7 states and 175 transitions. [2024-10-11 19:23:03,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 233 flow [2024-10-11 19:23:03,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 225 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:03,885 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 159 flow [2024-10-11 19:23:03,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-10-11 19:23:03,888 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-11 19:23:03,888 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 159 flow [2024-10-11 19:23:03,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 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) [2024-10-11 19:23:03,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:03,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:03,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:04,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:04,090 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:04,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1646348453, now seen corresponding path program 1 times [2024-10-11 19:23:04,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:04,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686805211] [2024-10-11 19:23:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:04,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686805211] [2024-10-11 19:23:04,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686805211] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:04,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:04,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:04,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251283724] [2024-10-11 19:23:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:04,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:23:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:23:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:23:04,135 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:04,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 159 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) [2024-10-11 19:23:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:04,172 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2024-10-11 19:23:04,173 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-10-11 19:23:04,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 109 events. 21/109 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 171. Up to 51 conditions per place. [2024-10-11 19:23:04,174 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2024-10-11 19:23:04,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 209 flow [2024-10-11 19:23:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:23:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:23:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-11 19:23:04,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-10-11 19:23:04,175 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 159 flow. Second operand 3 states and 89 transitions. [2024-10-11 19:23:04,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 209 flow [2024-10-11 19:23:04,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 193 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-11 19:23:04,178 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2024-10-11 19:23:04,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-11 19:23:04,179 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-11 19:23:04,179 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2024-10-11 19:23:04,180 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) [2024-10-11 19:23:04,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:04,180 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:04,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:23:04,180 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:04,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1748588019, now seen corresponding path program 1 times [2024-10-11 19:23:04,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:04,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781531792] [2024-10-11 19:23:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:04,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:04,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781531792] [2024-10-11 19:23:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781531792] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:04,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601719474] [2024-10-11 19:23:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:04,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:04,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:04,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:23:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:04,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:23:04,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:04,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:23:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:04,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601719474] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:04,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-11 19:23:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30914927] [2024-10-11 19:23:04,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:04,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 19:23:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 19:23:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-11 19:23:04,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-11 19:23:04,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 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) [2024-10-11 19:23:04,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-11 19:23:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:04,904 INFO L124 PetriNetUnfolderBase]: 26/115 cut-off events. [2024-10-11 19:23:04,905 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-11 19:23:04,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 115 events. 26/115 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 4 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 231. Up to 30 conditions per place. [2024-10-11 19:23:04,906 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2024-10-11 19:23:04,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 243 flow [2024-10-11 19:23:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:23:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:23:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-10-11 19:23:04,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-11 19:23:04,907 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 7 states and 188 transitions. [2024-10-11 19:23:04,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 243 flow [2024-10-11 19:23:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:23:04,910 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 192 flow [2024-10-11 19:23:04,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-10-11 19:23:04,910 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-10-11 19:23:04,910 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 192 flow [2024-10-11 19:23:04,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 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) [2024-10-11 19:23:04,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:04,911 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:04,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:23:05,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:05,116 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:05,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 177837018, now seen corresponding path program 1 times [2024-10-11 19:23:05,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:05,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184463704] [2024-10-11 19:23:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:05,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:05,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:05,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184463704] [2024-10-11 19:23:05,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184463704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:05,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:05,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:23:05,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069961818] [2024-10-11 19:23:05,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:05,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:05,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:05,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-11 19:23:05,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:05,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:05,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-11 19:23:05,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:05,265 INFO L124 PetriNetUnfolderBase]: 20/108 cut-off events. [2024-10-11 19:23:05,265 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-11 19:23:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 108 events. 20/108 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 11 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 263. Up to 51 conditions per place. [2024-10-11 19:23:05,266 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-10-11 19:23:05,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 246 flow [2024-10-11 19:23:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-11 19:23:05,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-10-11 19:23:05,267 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 192 flow. Second operand 4 states and 102 transitions. [2024-10-11 19:23:05,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 246 flow [2024-10-11 19:23:05,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 19:23:05,270 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 182 flow [2024-10-11 19:23:05,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-10-11 19:23:05,271 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-10-11 19:23:05,271 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 182 flow [2024-10-11 19:23:05,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:05,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:05,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:05,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:23:05,272 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:05,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1253845180, now seen corresponding path program 1 times [2024-10-11 19:23:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311843532] [2024-10-11 19:23:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:05,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:05,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311843532] [2024-10-11 19:23:05,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311843532] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:05,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:05,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 19:23:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734841924] [2024-10-11 19:23:05,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:05,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:23:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:23:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:23:05,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-11 19:23:05,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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) [2024-10-11 19:23:05,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:05,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-11 19:23:05,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:05,803 INFO L124 PetriNetUnfolderBase]: 24/129 cut-off events. [2024-10-11 19:23:05,805 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-11 19:23:05,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 129 events. 24/129 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 263 event pairs, 12 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 303. Up to 53 conditions per place. [2024-10-11 19:23:05,806 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 31 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2024-10-11 19:23:05,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 303 flow [2024-10-11 19:23:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:23:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:23:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-10-11 19:23:05,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-10-11 19:23:05,808 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 182 flow. Second operand 12 states and 256 transitions. [2024-10-11 19:23:05,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 303 flow [2024-10-11 19:23:05,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:05,810 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 240 flow [2024-10-11 19:23:05,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2024-10-11 19:23:05,813 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-10-11 19:23:05,813 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 240 flow [2024-10-11 19:23:05,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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) [2024-10-11 19:23:05,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:05,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:05,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:23:05,814 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:05,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 391753353, now seen corresponding path program 1 times [2024-10-11 19:23:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277631039] [2024-10-11 19:23:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:06,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277631039] [2024-10-11 19:23:06,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277631039] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:06,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:06,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 19:23:06,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370645417] [2024-10-11 19:23:06,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:06,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:23:06,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:23:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:23:06,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-10-11 19:23:06,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 240 flow. Second operand has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:06,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:06,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-10-11 19:23:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:06,387 INFO L124 PetriNetUnfolderBase]: 20/121 cut-off events. [2024-10-11 19:23:06,387 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-10-11 19:23:06,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 121 events. 20/121 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 238 event pairs, 9 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 326. Up to 45 conditions per place. [2024-10-11 19:23:06,388 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 24 selfloop transitions, 7 changer transitions 8/53 dead transitions. [2024-10-11 19:23:06,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 53 transitions, 329 flow [2024-10-11 19:23:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:23:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:23:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-10-11 19:23:06,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2024-10-11 19:23:06,390 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 240 flow. Second operand 10 states and 226 transitions. [2024-10-11 19:23:06,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 53 transitions, 329 flow [2024-10-11 19:23:06,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 53 transitions, 319 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:06,393 INFO L231 Difference]: Finished difference. Result has 73 places, 42 transitions, 215 flow [2024-10-11 19:23:06,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=73, PETRI_TRANSITIONS=42} [2024-10-11 19:23:06,394 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-11 19:23:06,394 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 42 transitions, 215 flow [2024-10-11 19:23:06,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:06,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:06,394 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:06,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:23:06,395 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:06,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2058489303, now seen corresponding path program 1 times [2024-10-11 19:23:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:06,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592894279] [2024-10-11 19:23:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:06,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592894279] [2024-10-11 19:23:06,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592894279] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786566688] [2024-10-11 19:23:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:06,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:06,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:06,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:23:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:06,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:23:06,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:06,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:06,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786566688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:06,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:06,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-11 19:23:06,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251420028] [2024-10-11 19:23:06,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:06,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:23:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:23:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:23:07,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:07,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 42 transitions, 215 flow. Second operand has 14 states, 14 states have (on average 26.071428571428573) internal successors, (365), 14 states have internal predecessors, (365), 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) [2024-10-11 19:23:07,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:07,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:07,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:07,244 INFO L124 PetriNetUnfolderBase]: 19/110 cut-off events. [2024-10-11 19:23:07,244 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-10-11 19:23:07,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 110 events. 19/110 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 182 event pairs, 9 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 293. Up to 41 conditions per place. [2024-10-11 19:23:07,245 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-10-11 19:23:07,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 46 transitions, 280 flow [2024-10-11 19:23:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:23:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:23:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-10-11 19:23:07,247 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805471124620061 [2024-10-11 19:23:07,247 INFO L175 Difference]: Start difference. First operand has 73 places, 42 transitions, 215 flow. Second operand 7 states and 191 transitions. [2024-10-11 19:23:07,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 46 transitions, 280 flow [2024-10-11 19:23:07,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 46 transitions, 258 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-10-11 19:23:07,250 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 203 flow [2024-10-11 19:23:07,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=203, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2024-10-11 19:23:07,251 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-10-11 19:23:07,251 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 203 flow [2024-10-11 19:23:07,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.071428571428573) internal successors, (365), 14 states have internal predecessors, (365), 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) [2024-10-11 19:23:07,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:07,251 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:07,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:07,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:07,452 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:07,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash -485710670, now seen corresponding path program 2 times [2024-10-11 19:23:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:07,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406404560] [2024-10-11 19:23:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:07,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:07,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406404560] [2024-10-11 19:23:07,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406404560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144074222] [2024-10-11 19:23:07,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:07,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:07,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:07,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:07,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:23:07,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:23:07,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:07,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 19:23:07,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:07,841 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:23:07,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 19:23:07,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:23:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:08,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:08,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144074222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:08,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:08,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-11 19:23:08,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049494873] [2024-10-11 19:23:08,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:08,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 19:23:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 19:23:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-10-11 19:23:09,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-11 19:23:09,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 203 flow. Second operand has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 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) [2024-10-11 19:23:09,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:09,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-11 19:23:09,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:09,455 INFO L124 PetriNetUnfolderBase]: 50/197 cut-off events. [2024-10-11 19:23:09,455 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2024-10-11 19:23:09,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 197 events. 50/197 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 313 event pairs, 6 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 590. Up to 40 conditions per place. [2024-10-11 19:23:09,459 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 47 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-10-11 19:23:09,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 491 flow [2024-10-11 19:23:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:23:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:23:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-10-11 19:23:09,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2024-10-11 19:23:09,460 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 203 flow. Second operand 11 states and 266 transitions. [2024-10-11 19:23:09,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 491 flow [2024-10-11 19:23:09,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 76 transitions, 479 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-11 19:23:09,464 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 335 flow [2024-10-11 19:23:09,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2024-10-11 19:23:09,466 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-10-11 19:23:09,468 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 335 flow [2024-10-11 19:23:09,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 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) [2024-10-11 19:23:09,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:09,468 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:09,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:23:09,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 19:23:09,669 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:09,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1383490036, now seen corresponding path program 2 times [2024-10-11 19:23:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93386024] [2024-10-11 19:23:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:09,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93386024] [2024-10-11 19:23:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93386024] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156645368] [2024-10-11 19:23:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:09,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:09,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:23:09,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:23:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:09,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:23:10,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:10,033 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:23:10,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 19:23:10,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:23:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 19:23:10,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 19:23:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156645368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:10,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-10-11 19:23:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116775325] [2024-10-11 19:23:10,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:10,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 19:23:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 19:23:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-10-11 19:23:11,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-10-11 19:23:11,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 335 flow. Second operand has 16 states, 16 states have (on average 22.8125) internal successors, (365), 16 states have internal predecessors, (365), 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) [2024-10-11 19:23:11,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:11,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-10-11 19:23:11,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:12,025 INFO L124 PetriNetUnfolderBase]: 57/196 cut-off events. [2024-10-11 19:23:12,025 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-10-11 19:23:12,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 196 events. 57/196 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 277 event pairs, 2 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 634. Up to 45 conditions per place. [2024-10-11 19:23:12,027 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 45 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2024-10-11 19:23:12,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 80 transitions, 561 flow [2024-10-11 19:23:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 19:23:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 19:23:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 390 transitions. [2024-10-11 19:23:12,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4881101376720901 [2024-10-11 19:23:12,030 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 335 flow. Second operand 17 states and 390 transitions. [2024-10-11 19:23:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 80 transitions, 561 flow [2024-10-11 19:23:12,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 533 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 19:23:12,034 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 374 flow [2024-10-11 19:23:12,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=374, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2024-10-11 19:23:12,035 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-10-11 19:23:12,035 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 374 flow [2024-10-11 19:23:12,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.8125) internal successors, (365), 16 states have internal predecessors, (365), 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) [2024-10-11 19:23:12,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:12,037 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:12,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:23:12,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 19:23:12,237 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:12,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1894038446, now seen corresponding path program 2 times [2024-10-11 19:23:12,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:12,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844988647] [2024-10-11 19:23:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:12,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:12,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844988647] [2024-10-11 19:23:12,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844988647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:12,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956329580] [2024-10-11 19:23:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:12,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:12,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:23:12,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:23:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:12,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:23:12,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:12,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:12,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956329580] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:12,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-11 19:23:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720128899] [2024-10-11 19:23:12,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:12,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 19:23:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 19:23:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-10-11 19:23:13,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:13,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 374 flow. Second operand has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 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) [2024-10-11 19:23:13,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:13,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:13,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:13,269 INFO L124 PetriNetUnfolderBase]: 35/172 cut-off events. [2024-10-11 19:23:13,269 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2024-10-11 19:23:13,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 172 events. 35/172 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 18 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 546. Up to 74 conditions per place. [2024-10-11 19:23:13,271 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-11 19:23:13,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 59 transitions, 456 flow [2024-10-11 19:23:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:23:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:23:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-10-11 19:23:13,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-10-11 19:23:13,272 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 374 flow. Second operand 8 states and 216 transitions. [2024-10-11 19:23:13,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 59 transitions, 456 flow [2024-10-11 19:23:13,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 59 transitions, 390 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-11 19:23:13,276 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 324 flow [2024-10-11 19:23:13,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2024-10-11 19:23:13,277 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-10-11 19:23:13,277 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 324 flow [2024-10-11 19:23:13,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 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) [2024-10-11 19:23:13,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:13,278 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:13,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:13,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 19:23:13,482 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:13,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 784914715, now seen corresponding path program 3 times [2024-10-11 19:23:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130241573] [2024-10-11 19:23:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:13,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130241573] [2024-10-11 19:23:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130241573] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720204620] [2024-10-11 19:23:13,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:23:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:13,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:13,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 19:23:13,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 19:23:13,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:13,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 19:23:13,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:14,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:14,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:14,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720204620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:14,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:14,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-11 19:23:14,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528988671] [2024-10-11 19:23:14,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:14,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 19:23:14,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 19:23:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-11 19:23:14,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:14,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 324 flow. Second operand has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 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) [2024-10-11 19:23:14,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:14,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:14,904 INFO L124 PetriNetUnfolderBase]: 32/167 cut-off events. [2024-10-11 19:23:14,904 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-10-11 19:23:14,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 167 events. 32/167 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 238 event pairs, 15 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 496. Up to 63 conditions per place. [2024-10-11 19:23:14,905 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-10-11 19:23:14,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 60 transitions, 415 flow [2024-10-11 19:23:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:23:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:23:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-10-11 19:23:14,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-10-11 19:23:14,906 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 324 flow. Second operand 9 states and 242 transitions. [2024-10-11 19:23:14,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 60 transitions, 415 flow [2024-10-11 19:23:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 60 transitions, 399 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-10-11 19:23:14,911 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 331 flow [2024-10-11 19:23:14,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2024-10-11 19:23:14,912 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-10-11 19:23:14,912 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 331 flow [2024-10-11 19:23:14,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 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) [2024-10-11 19:23:14,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:14,913 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:14,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 19:23:15,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:15,114 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:15,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1620704952, now seen corresponding path program 4 times [2024-10-11 19:23:15,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:15,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217110882] [2024-10-11 19:23:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:15,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217110882] [2024-10-11 19:23:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217110882] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396405222] [2024-10-11 19:23:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 19:23:15,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:15,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:15,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 19:23:15,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 19:23:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:15,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:23:15,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:15,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:15,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396405222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:16,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-11 19:23:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896203979] [2024-10-11 19:23:16,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:16,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 19:23:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 19:23:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-11 19:23:16,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:16,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 331 flow. Second operand has 23 states, 23 states have (on average 25.73913043478261) internal successors, (592), 23 states have internal predecessors, (592), 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) [2024-10-11 19:23:16,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:16,833 INFO L124 PetriNetUnfolderBase]: 29/162 cut-off events. [2024-10-11 19:23:16,833 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-11 19:23:16,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 162 events. 29/162 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 230 event pairs, 12 based on Foata normal form. 2/163 useless extension candidates. Maximal degree in co-relation 488. Up to 52 conditions per place. [2024-10-11 19:23:16,834 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-10-11 19:23:16,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 61 transitions, 427 flow [2024-10-11 19:23:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:23:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:23:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-10-11 19:23:16,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2024-10-11 19:23:16,836 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 331 flow. Second operand 10 states and 268 transitions. [2024-10-11 19:23:16,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 61 transitions, 427 flow [2024-10-11 19:23:16,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 61 transitions, 407 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-11 19:23:16,839 INFO L231 Difference]: Finished difference. Result has 88 places, 54 transitions, 337 flow [2024-10-11 19:23:16,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=337, PETRI_PLACES=88, PETRI_TRANSITIONS=54} [2024-10-11 19:23:16,840 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-10-11 19:23:16,840 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 54 transitions, 337 flow [2024-10-11 19:23:16,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.73913043478261) internal successors, (592), 23 states have internal predecessors, (592), 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) [2024-10-11 19:23:16,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:16,841 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:16,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 19:23:17,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 19:23:17,046 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:17,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -854395871, now seen corresponding path program 5 times [2024-10-11 19:23:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:17,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761028463] [2024-10-11 19:23:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:17,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761028463] [2024-10-11 19:23:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761028463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:17,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601547329] [2024-10-11 19:23:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 19:23:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:17,422 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:17,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 19:23:17,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-11 19:23:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:17,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 19:23:17,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:17,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:17,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601547329] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:18,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-11 19:23:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911223614] [2024-10-11 19:23:18,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:18,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 19:23:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 19:23:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-10-11 19:23:18,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:18,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 54 transitions, 337 flow. Second operand has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 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) [2024-10-11 19:23:18,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:18,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:18,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:19,035 INFO L124 PetriNetUnfolderBase]: 26/157 cut-off events. [2024-10-11 19:23:19,035 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-10-11 19:23:19,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 157 events. 26/157 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 198 event pairs, 9 based on Foata normal form. 2/158 useless extension candidates. Maximal degree in co-relation 472. Up to 41 conditions per place. [2024-10-11 19:23:19,036 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-10-11 19:23:19,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 62 transitions, 438 flow [2024-10-11 19:23:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:23:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:23:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-10-11 19:23:19,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686653771760155 [2024-10-11 19:23:19,038 INFO L175 Difference]: Start difference. First operand has 88 places, 54 transitions, 337 flow. Second operand 11 states and 294 transitions. [2024-10-11 19:23:19,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 62 transitions, 438 flow [2024-10-11 19:23:19,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 62 transitions, 414 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-11 19:23:19,042 INFO L231 Difference]: Finished difference. Result has 92 places, 54 transitions, 342 flow [2024-10-11 19:23:19,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=342, PETRI_PLACES=92, PETRI_TRANSITIONS=54} [2024-10-11 19:23:19,042 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-10-11 19:23:19,042 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 54 transitions, 342 flow [2024-10-11 19:23:19,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 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) [2024-10-11 19:23:19,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:19,043 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:19,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 19:23:19,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 19:23:19,248 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:19,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash 791631438, now seen corresponding path program 3 times [2024-10-11 19:23:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:19,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141896212] [2024-10-11 19:23:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 16 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:19,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:19,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141896212] [2024-10-11 19:23:19,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141896212] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:19,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601804696] [2024-10-11 19:23:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:23:19,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:19,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:19,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:19,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 19:23:19,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 19:23:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:19,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 19:23:19,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:19,836 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 19:23:19,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-11 19:23:19,850 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:23:19,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 19:23:20,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:23:20,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-11 19:23:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-11 19:23:20,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-11 19:23:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601804696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:21,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2024-10-11 19:23:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230521105] [2024-10-11 19:23:21,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:21,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 19:23:21,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 19:23:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-10-11 19:23:22,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-11 19:23:22,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 54 transitions, 342 flow. Second operand has 26 states, 26 states have (on average 21.384615384615383) internal successors, (556), 26 states have internal predecessors, (556), 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) [2024-10-11 19:23:22,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:22,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-11 19:23:22,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:23,802 INFO L124 PetriNetUnfolderBase]: 47/172 cut-off events. [2024-10-11 19:23:23,802 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2024-10-11 19:23:23,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 172 events. 47/172 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 197 event pairs, 2 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 528. Up to 45 conditions per place. [2024-10-11 19:23:23,805 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-10-11 19:23:23,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 84 transitions, 553 flow [2024-10-11 19:23:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 19:23:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 19:23:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 455 transitions. [2024-10-11 19:23:23,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46099290780141844 [2024-10-11 19:23:23,808 INFO L175 Difference]: Start difference. First operand has 92 places, 54 transitions, 342 flow. Second operand 21 states and 455 transitions. [2024-10-11 19:23:23,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 84 transitions, 553 flow [2024-10-11 19:23:23,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 487 flow, removed 7 selfloop flow, removed 19 redundant places. [2024-10-11 19:23:23,811 INFO L231 Difference]: Finished difference. Result has 92 places, 57 transitions, 309 flow [2024-10-11 19:23:23,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=309, PETRI_PLACES=92, PETRI_TRANSITIONS=57} [2024-10-11 19:23:23,812 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-10-11 19:23:23,812 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 57 transitions, 309 flow [2024-10-11 19:23:23,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.384615384615383) internal successors, (556), 26 states have internal predecessors, (556), 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) [2024-10-11 19:23:23,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:23,813 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:23,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:24,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 19:23:24,017 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:24,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2086260882, now seen corresponding path program 6 times [2024-10-11 19:23:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667374573] [2024-10-11 19:23:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:24,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:23:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667374573] [2024-10-11 19:23:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667374573] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:23:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15767758] [2024-10-11 19:23:24,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 19:23:24,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:24,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:23:24,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 19:23:24,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-11 19:23:24,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:24,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 19:23:24,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:24,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-10-11 19:23:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:24,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:25,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15767758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:25,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:23:25,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-10-11 19:23:25,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84268885] [2024-10-11 19:23:25,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:25,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 19:23:25,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:23:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 19:23:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-10-11 19:23:25,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 57 transitions, 309 flow. Second operand has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 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) [2024-10-11 19:23:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:25,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:26,129 INFO L124 PetriNetUnfolderBase]: 20/143 cut-off events. [2024-10-11 19:23:26,129 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-10-11 19:23:26,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 143 events. 20/143 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 129 event pairs, 5 based on Foata normal form. 2/144 useless extension candidates. Maximal degree in co-relation 380. Up to 27 conditions per place. [2024-10-11 19:23:26,130 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 30 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-10-11 19:23:26,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 65 transitions, 400 flow [2024-10-11 19:23:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:23:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:23:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 318 transitions. [2024-10-11 19:23:26,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-10-11 19:23:26,132 INFO L175 Difference]: Start difference. First operand has 92 places, 57 transitions, 309 flow. Second operand 12 states and 318 transitions. [2024-10-11 19:23:26,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 65 transitions, 400 flow [2024-10-11 19:23:26,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 65 transitions, 303 flow, removed 10 selfloop flow, removed 22 redundant places. [2024-10-11 19:23:26,135 INFO L231 Difference]: Finished difference. Result has 82 places, 56 transitions, 229 flow [2024-10-11 19:23:26,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=229, PETRI_PLACES=82, PETRI_TRANSITIONS=56} [2024-10-11 19:23:26,135 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-10-11 19:23:26,135 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 56 transitions, 229 flow [2024-10-11 19:23:26,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 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) [2024-10-11 19:23:26,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:26,136 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:26,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:26,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:23:26,341 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:26,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash 673952511, now seen corresponding path program 7 times [2024-10-11 19:23:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:23:26,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423795601] [2024-10-11 19:23:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:23:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:23:26,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:23:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:23:26,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:23:26,420 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:23:26,421 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2024-10-11 19:23:26,423 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2024-10-11 19:23:26,423 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2024-10-11 19:23:26,423 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2024-10-11 19:23:26,423 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2024-10-11 19:23:26,423 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2024-10-11 19:23:26,424 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2024-10-11 19:23:26,425 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2024-10-11 19:23:26,425 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2024-10-11 19:23:26,425 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2024-10-11 19:23:26,425 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2024-10-11 19:23:26,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-11 19:23:26,425 INFO L407 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:26,498 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-11 19:23:26,498 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 19:23:26,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:23:26 BasicIcfg [2024-10-11 19:23:26,503 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 19:23:26,503 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 19:23:26,503 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 19:23:26,504 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 19:23:26,504 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:23:00" (3/4) ... [2024-10-11 19:23:26,506 INFO L142 WitnessPrinter]: No result that supports witness generation found [2024-10-11 19:23:26,507 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 19:23:26,507 INFO L158 Benchmark]: Toolchain (without parser) took 26923.45ms. Allocated memory was 155.2MB in the beginning and 295.7MB in the end (delta: 140.5MB). Free memory was 99.9MB in the beginning and 250.9MB in the end (delta: -151.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:23:26,508 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:23:26,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 588.88ms. Allocated memory is still 155.2MB. Free memory was 99.7MB in the beginning and 64.3MB in the end (delta: 35.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-10-11 19:23:26,508 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.32ms. Allocated memory is still 155.2MB. Free memory was 64.3MB in the beginning and 62.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 19:23:26,509 INFO L158 Benchmark]: Boogie Preprocessor took 44.93ms. Allocated memory is still 155.2MB. Free memory was 62.3MB in the beginning and 59.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 19:23:26,509 INFO L158 Benchmark]: RCFGBuilder took 509.85ms. Allocated memory is still 155.2MB. Free memory was 59.9MB in the beginning and 117.2MB in the end (delta: -57.3MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. [2024-10-11 19:23:26,509 INFO L158 Benchmark]: TraceAbstraction took 25720.91ms. Allocated memory was 155.2MB in the beginning and 295.7MB in the end (delta: 140.5MB). Free memory was 116.4MB in the beginning and 252.0MB in the end (delta: -135.6MB). Peak memory consumption was 171.0MB. Max. memory is 16.1GB. [2024-10-11 19:23:26,509 INFO L158 Benchmark]: Witness Printer took 3.63ms. Allocated memory is still 295.7MB. Free memory is still 250.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:23:26,513 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 588.88ms. Allocated memory is still 155.2MB. Free memory was 99.7MB in the beginning and 64.3MB in the end (delta: 35.4MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.32ms. Allocated memory is still 155.2MB. Free memory was 64.3MB in the beginning and 62.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.93ms. Allocated memory is still 155.2MB. Free memory was 62.3MB in the beginning and 59.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 509.85ms. Allocated memory is still 155.2MB. Free memory was 59.9MB in the beginning and 117.2MB in the end (delta: -57.3MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. * TraceAbstraction took 25720.91ms. Allocated memory was 155.2MB in the beginning and 295.7MB in the end (delta: 140.5MB). Free memory was 116.4MB in the beginning and 252.0MB in the end (delta: -135.6MB). Peak memory consumption was 171.0MB. Max. memory is 16.1GB. * Witness Printer took 3.63ms. Allocated memory is still 295.7MB. Free memory is still 250.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-1, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={-1:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1116] COND TRUE 2 \read(*v) [L1116] CALL 2 strcpy(v, "Bigshot") [L1116] RET 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, v={-1:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={-1:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.5s, OverallIterations: 20, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3222 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2881 mSDsluCounter, 3680 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3617 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15549 IncrementalHoareTripleChecker+Invalid, 15641 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 63 mSDtfsCounter, 15549 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1099 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=374occurred in iteration=13, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 1107 NumberOfCodeBlocks, 1041 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1447 ConstructedInterpolants, 63 QuantifiedInterpolants, 18901 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2179 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 41 InterpolantComputations, 8 PerfectInterpolantSequences, 398/1866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-10-11 19:23:26,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:23:28,575 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:23:28,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:23:28,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:23:28,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:23:28,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:23:28,699 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:23:28,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:23:28,700 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:23:28,701 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:23:28,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:23:28,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:23:28,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:23:28,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:23:28,702 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:23:28,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:23:28,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:23:28,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:23:28,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:23:28,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:23:28,707 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:23:28,707 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:23:28,708 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:23:28,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:23:28,708 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:23:28,709 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:23:28,709 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:23:28,709 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:23:28,710 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:23:28,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:23:28,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:23:28,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:23:28,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:23:28,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:23:28,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:23:28,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:23:28,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:23:28,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:23:28,712 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:23:28,712 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:23:28,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:23:28,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:23:28,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:23:28,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:23:28,714 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:23:28,715 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-10-11 19:23:29,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:23:29,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:23:29,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:23:29,061 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:23:29,062 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:23:29,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-11 19:23:30,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:23:30,890 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:23:30,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-11 19:23:30,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3ec833600/8d6b76b3e0194d65a8057f2d5d0c17bd/FLAGe1740bcdd [2024-10-11 19:23:30,931 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3ec833600/8d6b76b3e0194d65a8057f2d5d0c17bd [2024-10-11 19:23:30,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:23:30,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:23:30,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:23:30,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:23:30,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:23:30,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:23:30" (1/1) ... [2024-10-11 19:23:30,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eab4876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:30, skipping insertion in model container [2024-10-11 19:23:30,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:23:30" (1/1) ... [2024-10-11 19:23:31,000 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:23:31,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:23:31,489 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:23:31,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:23:31,611 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:23:31,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31 WrapperNode [2024-10-11 19:23:31,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:23:31,613 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:23:31,613 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:23:31,613 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:23:31,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,670 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2024-10-11 19:23:31,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:23:31,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:23:31,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:23:31,671 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:23:31,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,687 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,719 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-10-11 19:23:31,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:23:31,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:23:31,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:23:31,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:23:31,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (1/1) ... [2024-10-11 19:23:31,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:23:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:23:31,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:23:31,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:23:31,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:23:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:23:31,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:23:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:23:31,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:23:31,833 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:23:31,990 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:23:31,992 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:23:32,241 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:23:32,241 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:23:32,407 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:23:32,407 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 19:23:32,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:23:32 BoogieIcfgContainer [2024-10-11 19:23:32,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:23:32,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:23:32,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:23:32,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:23:32,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:23:30" (1/3) ... [2024-10-11 19:23:32,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d71b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:23:32, skipping insertion in model container [2024-10-11 19:23:32,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:23:31" (2/3) ... [2024-10-11 19:23:32,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d71b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:23:32, skipping insertion in model container [2024-10-11 19:23:32,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:23:32" (3/3) ... [2024-10-11 19:23:32,420 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-10-11 19:23:32,438 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:23:32,438 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-11 19:23:32,438 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:23:32,501 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:23:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2024-10-11 19:23:32,576 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2024-10-11 19:23:32,577 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:32,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-10-11 19:23:32,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2024-10-11 19:23:32,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2024-10-11 19:23:32,592 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:23:32,602 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;@51b1124a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:23:32,603 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-11 19:23:32,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:23:32,612 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-11 19:23:32,613 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:32,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:32,613 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:32,614 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:32,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2100677542, now seen corresponding path program 1 times [2024-10-11 19:23:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:32,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106810872] [2024-10-11 19:23:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:32,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:32,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-11 19:23:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:32,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:23:32,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:32,859 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-11 19:23:32,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-11 19:23:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:32,906 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:32,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:32,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106810872] [2024-10-11 19:23:32,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106810872] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:32,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:32,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:23:32,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663746091] [2024-10-11 19:23:32,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:32,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:32,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-11 19:23:32,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:32,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:32,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-11 19:23:33,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:33,075 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2024-10-11 19:23:33,076 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:23:33,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 58 events. 9/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 2 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 76. Up to 21 conditions per place. [2024-10-11 19:23:33,078 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 16 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-10-11 19:23:33,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 128 flow [2024-10-11 19:23:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-11 19:23:33,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-10-11 19:23:33,089 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-10-11 19:23:33,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 128 flow [2024-10-11 19:23:33,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:23:33,094 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2024-10-11 19:23:33,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-11 19:23:33,100 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:33,100 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2024-10-11 19:23:33,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:33,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:33,100 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:33,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-11 19:23:33,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:33,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:33,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash 696494632, now seen corresponding path program 1 times [2024-10-11 19:23:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:33,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687246533] [2024-10-11 19:23:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:33,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:33,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:33,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-11 19:23:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:33,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:23:33,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:33,457 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:23:33,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 19:23:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:33,545 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:33,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687246533] [2024-10-11 19:23:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687246533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:33,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:23:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925453130] [2024-10-11 19:23:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:33,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:33,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-11 19:23:33,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:33,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:33,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-11 19:23:33,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:33,695 INFO L124 PetriNetUnfolderBase]: 15/75 cut-off events. [2024-10-11 19:23:33,695 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:23:33,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 75 events. 15/75 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 6 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 47. Up to 37 conditions per place. [2024-10-11 19:23:33,696 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-10-11 19:23:33,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 144 flow [2024-10-11 19:23:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-11 19:23:33,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-11 19:23:33,698 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 114 transitions. [2024-10-11 19:23:33,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 144 flow [2024-10-11 19:23:33,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:33,704 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2024-10-11 19:23:33,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-11 19:23:33,704 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-10-11 19:23:33,705 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2024-10-11 19:23:33,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:33,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:33,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:33,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-11 19:23:33,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:33,906 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:33,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 116497384, now seen corresponding path program 1 times [2024-10-11 19:23:33,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083996014] [2024-10-11 19:23:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:33,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-11 19:23:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:33,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:23:33,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:33,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:23:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:34,013 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:34,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:34,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083996014] [2024-10-11 19:23:34,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083996014] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:34,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831026645] [2024-10-11 19:23:34,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:34,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:34,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-11 19:23:34,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-11 19:23:34,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:34,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-11 19:23:34,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:34,144 INFO L124 PetriNetUnfolderBase]: 15/77 cut-off events. [2024-10-11 19:23:34,145 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 19:23:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2024-10-11 19:23:34,147 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-11 19:23:34,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2024-10-11 19:23:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-10-11 19:23:34,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-11 19:23:34,150 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2024-10-11 19:23:34,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2024-10-11 19:23:34,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:23:34,152 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2024-10-11 19:23:34,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-11 19:23:34,153 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:34,154 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2024-10-11 19:23:34,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-11 19:23:34,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:34,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:34,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:34,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:34,355 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:34,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash -683548118, now seen corresponding path program 1 times [2024-10-11 19:23:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413616310] [2024-10-11 19:23:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:34,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:34,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:34,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-11 19:23:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:34,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:23:34,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:34,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:23:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:34,549 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:34,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413616310] [2024-10-11 19:23:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413616310] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:34,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:34,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:34,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937034996] [2024-10-11 19:23:34,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:34,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:34,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:34,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-11 19:23:34,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:34,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:34,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-11 19:23:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:34,710 INFO L124 PetriNetUnfolderBase]: 14/66 cut-off events. [2024-10-11 19:23:34,710 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 19:23:34,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2024-10-11 19:23:34,711 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-11 19:23:34,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2024-10-11 19:23:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-11 19:23:34,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-11 19:23:34,714 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2024-10-11 19:23:34,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2024-10-11 19:23:34,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:34,716 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2024-10-11 19:23:34,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-11 19:23:34,720 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-11 19:23:34,720 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2024-10-11 19:23:34,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:34,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:34,721 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:34,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-11 19:23:34,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:34,921 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:34,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:34,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1034755921, now seen corresponding path program 1 times [2024-10-11 19:23:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424511148] [2024-10-11 19:23:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:34,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:34,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:34,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-11 19:23:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:35,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:23:35,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:35,041 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:23:35,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 19:23:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:35,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:35,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424511148] [2024-10-11 19:23:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424511148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:35,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2024-10-11 19:23:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355418101] [2024-10-11 19:23:35,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:35,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:23:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:23:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:23:35,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-11 19:23:35,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 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) [2024-10-11 19:23:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:35,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-11 19:23:35,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:36,108 INFO L124 PetriNetUnfolderBase]: 27/119 cut-off events. [2024-10-11 19:23:36,109 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-10-11 19:23:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 119 events. 27/119 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 3 based on Foata normal form. 12/126 useless extension candidates. Maximal degree in co-relation 81. Up to 30 conditions per place. [2024-10-11 19:23:36,110 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 26 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2024-10-11 19:23:36,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 217 flow [2024-10-11 19:23:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:23:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:23:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-10-11 19:23:36,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-10-11 19:23:36,115 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 8 states and 212 transitions. [2024-10-11 19:23:36,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 217 flow [2024-10-11 19:23:36,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 209 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:36,119 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 161 flow [2024-10-11 19:23:36,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-11 19:23:36,120 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-10-11 19:23:36,120 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 161 flow [2024-10-11 19:23:36,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 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) [2024-10-11 19:23:36,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:36,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:36,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:36,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:36,322 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:36,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2004768693, now seen corresponding path program 1 times [2024-10-11 19:23:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932472339] [2024-10-11 19:23:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:36,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:36,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-11 19:23:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:36,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 19:23:36,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:36,408 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:36,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932472339] [2024-10-11 19:23:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932472339] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:23:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985022612] [2024-10-11 19:23:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:36,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:23:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:23:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:23:36,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:36,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 161 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) [2024-10-11 19:23:36,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:36,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:36,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:36,473 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2024-10-11 19:23:36,473 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-11 19:23:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 109 events. 21/109 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 207 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 173. Up to 51 conditions per place. [2024-10-11 19:23:36,475 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2024-10-11 19:23:36,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 211 flow [2024-10-11 19:23:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:23:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:23:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-11 19:23:36,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-10-11 19:23:36,476 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 161 flow. Second operand 3 states and 89 transitions. [2024-10-11 19:23:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 211 flow [2024-10-11 19:23:36,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 193 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:36,479 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2024-10-11 19:23:36,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-11 19:23:36,480 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-11 19:23:36,480 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2024-10-11 19:23:36,481 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) [2024-10-11 19:23:36,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:36,481 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:36,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-11 19:23:36,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:36,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:36,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2031981297, now seen corresponding path program 1 times [2024-10-11 19:23:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570229000] [2024-10-11 19:23:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:36,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:36,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-11 19:23:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:36,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:23:36,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:36,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:23:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:36,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:36,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570229000] [2024-10-11 19:23:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570229000] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:36,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-11 19:23:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999309085] [2024-10-11 19:23:36,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:36,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:23:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:23:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:23:37,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-11 19:23:37,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:37,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:37,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-11 19:23:37,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:37,405 INFO L124 PetriNetUnfolderBase]: 26/115 cut-off events. [2024-10-11 19:23:37,405 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-11 19:23:37,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 115 events. 26/115 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 4 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 231. Up to 30 conditions per place. [2024-10-11 19:23:37,406 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2024-10-11 19:23:37,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 243 flow [2024-10-11 19:23:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:23:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:23:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-10-11 19:23:37,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-11 19:23:37,408 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 7 states and 188 transitions. [2024-10-11 19:23:37,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 243 flow [2024-10-11 19:23:37,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:23:37,411 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 192 flow [2024-10-11 19:23:37,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-10-11 19:23:37,418 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-10-11 19:23:37,418 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 192 flow [2024-10-11 19:23:37,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:37,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:37,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:37,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:37,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:37,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1448504088, now seen corresponding path program 1 times [2024-10-11 19:23:37,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307350281] [2024-10-11 19:23:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:37,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:37,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:37,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-11 19:23:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:37,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:23:37,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:37,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:37,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:37,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307350281] [2024-10-11 19:23:37,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307350281] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:37,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:37,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:23:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174984031] [2024-10-11 19:23:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:37,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:23:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:23:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:23:37,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-11 19:23:37,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:37,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:37,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-11 19:23:37,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:37,802 INFO L124 PetriNetUnfolderBase]: 20/108 cut-off events. [2024-10-11 19:23:37,803 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-10-11 19:23:37,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 108 events. 20/108 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 11 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 263. Up to 51 conditions per place. [2024-10-11 19:23:37,804 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-10-11 19:23:37,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 246 flow [2024-10-11 19:23:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:23:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:23:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-11 19:23:37,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-10-11 19:23:37,805 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 192 flow. Second operand 4 states and 102 transitions. [2024-10-11 19:23:37,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 246 flow [2024-10-11 19:23:37,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 19:23:37,808 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 182 flow [2024-10-11 19:23:37,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-10-11 19:23:37,809 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-10-11 19:23:37,809 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 182 flow [2024-10-11 19:23:37,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:23:37,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:37,809 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:37,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:38,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:38,011 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:38,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1989818688, now seen corresponding path program 1 times [2024-10-11 19:23:38,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822581631] [2024-10-11 19:23:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:38,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:38,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-11 19:23:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:38,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:23:38,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:38,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-10-11 19:23:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:38,167 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:23:38,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822581631] [2024-10-11 19:23:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822581631] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:23:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:23:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:23:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257107764] [2024-10-11 19:23:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:23:38,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:23:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:23:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:23:38,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:38,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-11 19:23:38,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:38,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:38,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:38,318 INFO L124 PetriNetUnfolderBase]: 21/112 cut-off events. [2024-10-11 19:23:38,318 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-11 19:23:38,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 112 events. 21/112 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 12 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 258. Up to 52 conditions per place. [2024-10-11 19:23:38,319 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-11 19:23:38,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 241 flow [2024-10-11 19:23:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:23:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:23:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-10-11 19:23:38,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2024-10-11 19:23:38,321 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 182 flow. Second operand 6 states and 164 transitions. [2024-10-11 19:23:38,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 241 flow [2024-10-11 19:23:38,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:23:38,324 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 187 flow [2024-10-11 19:23:38,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2024-10-11 19:23:38,324 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-10-11 19:23:38,324 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 187 flow [2024-10-11 19:23:38,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-11 19:23:38,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:38,325 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:38,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-11 19:23:38,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:38,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:38,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -226414099, now seen corresponding path program 1 times [2024-10-11 19:23:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:38,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290412817] [2024-10-11 19:23:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:38,529 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:38,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-11 19:23:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:38,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:23:38,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:38,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-10-11 19:23:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:38,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:38,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290412817] [2024-10-11 19:23:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290412817] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:38,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 19:23:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587255073] [2024-10-11 19:23:38,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:38,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:23:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:23:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:23:39,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:39,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 187 flow. Second operand has 10 states, 10 states have (on average 26.2) internal successors, (262), 10 states have internal predecessors, (262), 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) [2024-10-11 19:23:39,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:39,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:39,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:39,227 INFO L124 PetriNetUnfolderBase]: 18/107 cut-off events. [2024-10-11 19:23:39,227 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-10-11 19:23:39,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 107 events. 18/107 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 7 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 258. Up to 35 conditions per place. [2024-10-11 19:23:39,228 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 22 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2024-10-11 19:23:39,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 46 transitions, 254 flow [2024-10-11 19:23:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:23:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:23:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-10-11 19:23:39,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-11 19:23:39,230 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 187 flow. Second operand 8 states and 214 transitions. [2024-10-11 19:23:39,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 46 transitions, 254 flow [2024-10-11 19:23:39,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 46 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:23:39,232 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 201 flow [2024-10-11 19:23:39,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=201, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-10-11 19:23:39,233 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-10-11 19:23:39,233 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 201 flow [2024-10-11 19:23:39,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.2) internal successors, (262), 10 states have internal predecessors, (262), 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) [2024-10-11 19:23:39,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:39,233 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:39,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-11 19:23:39,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:39,434 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:39,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 595421104, now seen corresponding path program 2 times [2024-10-11 19:23:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867985634] [2024-10-11 19:23:39,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:39,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:39,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:39,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:39,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-11 19:23:39,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:23:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:39,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:23:39,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:23:39,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:23:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:39,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:40,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867985634] [2024-10-11 19:23:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867985634] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:40,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:40,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-10-11 19:23:40,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891021682] [2024-10-11 19:23:40,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:40,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 19:23:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 19:23:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-10-11 19:23:40,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-11 19:23:40,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 201 flow. Second operand has 16 states, 16 states have (on average 19.25) internal successors, (308), 16 states have internal predecessors, (308), 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) [2024-10-11 19:23:40,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:40,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-11 19:23:40,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:41,291 INFO L124 PetriNetUnfolderBase]: 50/197 cut-off events. [2024-10-11 19:23:41,292 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-10-11 19:23:41,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 197 events. 50/197 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 6 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 598. Up to 40 conditions per place. [2024-10-11 19:23:41,293 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 47 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-10-11 19:23:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 497 flow [2024-10-11 19:23:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:23:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:23:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-10-11 19:23:41,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47195357833655704 [2024-10-11 19:23:41,295 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 201 flow. Second operand 11 states and 244 transitions. [2024-10-11 19:23:41,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 497 flow [2024-10-11 19:23:41,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 475 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-11 19:23:41,299 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 339 flow [2024-10-11 19:23:41,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=339, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2024-10-11 19:23:41,300 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-11 19:23:41,300 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 339 flow [2024-10-11 19:23:41,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.25) internal successors, (308), 16 states have internal predecessors, (308), 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) [2024-10-11 19:23:41,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:41,301 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:41,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-11 19:23:41,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:41,501 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:41,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 969039282, now seen corresponding path program 2 times [2024-10-11 19:23:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181246828] [2024-10-11 19:23:41,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:41,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:41,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:41,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-11 19:23:41,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:23:41,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:41,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:23:41,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:41,600 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:23:41,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 19:23:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 19:23:42,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 19:23:42,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181246828] [2024-10-11 19:23:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181246828] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:42,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:23:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118675368] [2024-10-11 19:23:42,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:42,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:23:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:23:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:23:42,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-11 19:23:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 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) [2024-10-11 19:23:42,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:42,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-11 19:23:42,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:42,922 INFO L124 PetriNetUnfolderBase]: 48/187 cut-off events. [2024-10-11 19:23:42,923 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2024-10-11 19:23:42,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 187 events. 48/187 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 270 event pairs, 2 based on Foata normal form. 8/194 useless extension candidates. Maximal degree in co-relation 596. Up to 77 conditions per place. [2024-10-11 19:23:42,926 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 22 selfloop transitions, 20 changer transitions 0/53 dead transitions. [2024-10-11 19:23:42,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 53 transitions, 423 flow [2024-10-11 19:23:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:23:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:23:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-10-11 19:23:42,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-10-11 19:23:42,930 INFO L175 Difference]: Start difference. First operand has 73 places, 50 transitions, 339 flow. Second operand 6 states and 145 transitions. [2024-10-11 19:23:42,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 53 transitions, 423 flow [2024-10-11 19:23:42,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 53 transitions, 396 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 19:23:42,936 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 359 flow [2024-10-11 19:23:42,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2024-10-11 19:23:42,938 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-10-11 19:23:42,938 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 359 flow [2024-10-11 19:23:42,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 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) [2024-10-11 19:23:42,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:42,940 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:42,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-11 19:23:43,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:43,141 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:43,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1930966962, now seen corresponding path program 2 times [2024-10-11 19:23:43,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376422482] [2024-10-11 19:23:43,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:23:43,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:43,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:43,143 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:43,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-11 19:23:43,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:23:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:43,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 19:23:43,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:43,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:23:43,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 19:23:43,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-10-11 19:23:43,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 8 [2024-10-11 19:23:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:43,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:44,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 35 [2024-10-11 19:23:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:44,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:44,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376422482] [2024-10-11 19:23:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376422482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:44,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2024-10-11 19:23:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222241996] [2024-10-11 19:23:44,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:44,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 19:23:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 19:23:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-10-11 19:23:45,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-11 19:23:45,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 359 flow. Second operand has 19 states, 19 states have (on average 18.789473684210527) internal successors, (357), 19 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:45,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:45,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-11 19:23:45,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:46,426 INFO L124 PetriNetUnfolderBase]: 43/192 cut-off events. [2024-10-11 19:23:46,426 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-10-11 19:23:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 192 events. 43/192 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 10 based on Foata normal form. 2/192 useless extension candidates. Maximal degree in co-relation 617. Up to 49 conditions per place. [2024-10-11 19:23:46,428 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 39 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2024-10-11 19:23:46,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 528 flow [2024-10-11 19:23:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 19:23:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 19:23:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 345 transitions. [2024-10-11 19:23:46,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4078014184397163 [2024-10-11 19:23:46,430 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 359 flow. Second operand 18 states and 345 transitions. [2024-10-11 19:23:46,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 528 flow [2024-10-11 19:23:46,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 72 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:23:46,434 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 414 flow [2024-10-11 19:23:46,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=414, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2024-10-11 19:23:46,435 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-10-11 19:23:46,435 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 414 flow [2024-10-11 19:23:46,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.789473684210527) internal successors, (357), 19 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:23:46,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:46,436 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:46,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-11 19:23:46,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:46,636 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:46,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -23103902, now seen corresponding path program 1 times [2024-10-11 19:23:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833656222] [2024-10-11 19:23:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:23:46,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:46,638 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:46,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-11 19:23:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:23:46,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:23:46,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:46,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-10-11 19:23:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:47,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:47,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833656222] [2024-10-11 19:23:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833656222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:47,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 19:23:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533162283] [2024-10-11 19:23:47,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:47,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:23:47,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:23:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:23:47,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:47,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 25.857142857142858) internal successors, (362), 14 states have internal predecessors, (362), 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) [2024-10-11 19:23:47,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:47,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:47,654 INFO L124 PetriNetUnfolderBase]: 32/167 cut-off events. [2024-10-11 19:23:47,654 INFO L125 PetriNetUnfolderBase]: For 600/600 co-relation queries the response was YES. [2024-10-11 19:23:47,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 167 events. 32/167 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 240 event pairs, 11 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 599. Up to 51 conditions per place. [2024-10-11 19:23:47,655 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 28 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2024-10-11 19:23:47,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 59 transitions, 484 flow [2024-10-11 19:23:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:23:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:23:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2024-10-11 19:23:47,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-10-11 19:23:47,656 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 414 flow. Second operand 12 states and 314 transitions. [2024-10-11 19:23:47,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 59 transitions, 484 flow [2024-10-11 19:23:47,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 59 transitions, 429 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-10-11 19:23:47,661 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 355 flow [2024-10-11 19:23:47,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2024-10-11 19:23:47,662 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-10-11 19:23:47,662 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 355 flow [2024-10-11 19:23:47,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.857142857142858) internal successors, (362), 14 states have internal predecessors, (362), 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) [2024-10-11 19:23:47,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:47,663 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:47,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-11 19:23:47,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:47,863 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:47,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash -960558792, now seen corresponding path program 3 times [2024-10-11 19:23:47,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:47,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628753701] [2024-10-11 19:23:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:23:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:47,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-11 19:23:47,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-11 19:23:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:47,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 19:23:47,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:48,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:23:49,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 19:23:49,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2024-10-11 19:23:49,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 8 [2024-10-11 19:23:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:49,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:49,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 35 [2024-10-11 19:23:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:50,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628753701] [2024-10-11 19:23:50,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628753701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:50,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:50,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2024-10-11 19:23:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535236751] [2024-10-11 19:23:50,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:50,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 19:23:50,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 19:23:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-10-11 19:23:51,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-11 19:23:51,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 355 flow. Second operand has 23 states, 23 states have (on average 18.82608695652174) internal successors, (433), 23 states have internal predecessors, (433), 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) [2024-10-11 19:23:51,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:51,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-11 19:23:51,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:54,051 INFO L124 PetriNetUnfolderBase]: 54/241 cut-off events. [2024-10-11 19:23:54,051 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2024-10-11 19:23:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 241 events. 54/241 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 389 event pairs, 4 based on Foata normal form. 3/243 useless extension candidates. Maximal degree in co-relation 865. Up to 44 conditions per place. [2024-10-11 19:23:54,053 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 58 selfloop transitions, 34 changer transitions 0/103 dead transitions. [2024-10-11 19:23:54,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 103 transitions, 802 flow [2024-10-11 19:23:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 19:23:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 19:23:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 558 transitions. [2024-10-11 19:23:54,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40939104915627295 [2024-10-11 19:23:54,056 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 355 flow. Second operand 29 states and 558 transitions. [2024-10-11 19:23:54,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 103 transitions, 802 flow [2024-10-11 19:23:54,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 756 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 19:23:54,062 INFO L231 Difference]: Finished difference. Result has 108 places, 68 transitions, 578 flow [2024-10-11 19:23:54,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=578, PETRI_PLACES=108, PETRI_TRANSITIONS=68} [2024-10-11 19:23:54,064 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-10-11 19:23:54,064 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 68 transitions, 578 flow [2024-10-11 19:23:54,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.82608695652174) internal successors, (433), 23 states have internal predecessors, (433), 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) [2024-10-11 19:23:54,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:54,065 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:54,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-10-11 19:23:54,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:54,266 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:54,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1087122109, now seen corresponding path program 4 times [2024-10-11 19:23:54,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:54,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053466116] [2024-10-11 19:23:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 19:23:54,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:54,268 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:54,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-11 19:23:54,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 19:23:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:54,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:23:54,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:54,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-10-11 19:23:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:54,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:23:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:23:54,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:23:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053466116] [2024-10-11 19:23:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053466116] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:23:54,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:23:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-10-11 19:23:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997601946] [2024-10-11 19:23:54,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:23:54,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 19:23:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:23:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 19:23:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-10-11 19:23:55,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-11 19:23:55,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 68 transitions, 578 flow. Second operand has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-10-11 19:23:55,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:23:55,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-11 19:23:55,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:23:55,755 INFO L124 PetriNetUnfolderBase]: 40/225 cut-off events. [2024-10-11 19:23:55,755 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-10-11 19:23:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 225 events. 40/225 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 15 based on Foata normal form. 2/226 useless extension candidates. Maximal degree in co-relation 881. Up to 67 conditions per place. [2024-10-11 19:23:55,757 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 38 selfloop transitions, 23 changer transitions 0/80 dead transitions. [2024-10-11 19:23:55,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 80 transitions, 711 flow [2024-10-11 19:23:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 19:23:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 19:23:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 414 transitions. [2024-10-11 19:23:55,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-10-11 19:23:55,759 INFO L175 Difference]: Start difference. First operand has 108 places, 68 transitions, 578 flow. Second operand 16 states and 414 transitions. [2024-10-11 19:23:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 80 transitions, 711 flow [2024-10-11 19:23:55,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 80 transitions, 673 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-10-11 19:23:55,767 INFO L231 Difference]: Finished difference. Result has 113 places, 67 transitions, 575 flow [2024-10-11 19:23:55,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=575, PETRI_PLACES=113, PETRI_TRANSITIONS=67} [2024-10-11 19:23:55,769 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-10-11 19:23:55,769 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 67 transitions, 575 flow [2024-10-11 19:23:55,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-10-11 19:23:55,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:23:55,771 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:23:55,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-11 19:23:55,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:55,975 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:23:55,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:23:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1467565216, now seen corresponding path program 3 times [2024-10-11 19:23:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:23:55,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006721815] [2024-10-11 19:23:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:23:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:23:55,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:23:55,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:23:55,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-11 19:23:56,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 19:23:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:23:56,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:23:56,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:23:56,082 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:23:56,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 19:23:56,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:23:56,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-10-11 19:23:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-11 19:23:56,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-11 19:24:02,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:24:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006721815] [2024-10-11 19:24:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006721815] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:02,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:24:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-10-11 19:24:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618040103] [2024-10-11 19:24:02,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:02,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:24:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:24:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:24:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2024-10-11 19:24:04,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-11 19:24:04,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 67 transitions, 575 flow. Second operand has 13 states, 13 states have (on average 22.307692307692307) internal successors, (290), 13 states have internal predecessors, (290), 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) [2024-10-11 19:24:04,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:04,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-11 19:24:04,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:06,228 INFO L124 PetriNetUnfolderBase]: 51/230 cut-off events. [2024-10-11 19:24:06,229 INFO L125 PetriNetUnfolderBase]: For 1201/1201 co-relation queries the response was YES. [2024-10-11 19:24:06,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 230 events. 51/230 cut-off events. For 1201/1201 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 352 event pairs, 5 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 889. Up to 62 conditions per place. [2024-10-11 19:24:06,230 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 28 changer transitions 0/69 dead transitions. [2024-10-11 19:24:06,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 69 transitions, 673 flow [2024-10-11 19:24:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:24:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:24:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-10-11 19:24:06,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-10-11 19:24:06,233 INFO L175 Difference]: Start difference. First operand has 113 places, 67 transitions, 575 flow. Second operand 6 states and 147 transitions. [2024-10-11 19:24:06,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 69 transitions, 673 flow [2024-10-11 19:24:06,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 69 transitions, 596 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-10-11 19:24:06,250 INFO L231 Difference]: Finished difference. Result has 95 places, 66 transitions, 536 flow [2024-10-11 19:24:06,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=536, PETRI_PLACES=95, PETRI_TRANSITIONS=66} [2024-10-11 19:24:06,250 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-10-11 19:24:06,251 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 66 transitions, 536 flow [2024-10-11 19:24:06,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.307692307692307) internal successors, (290), 13 states have internal predecessors, (290), 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) [2024-10-11 19:24:06,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:06,251 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:06,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-11 19:24:06,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:24:06,455 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:24:06,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 843605457, now seen corresponding path program 2 times [2024-10-11 19:24:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:24:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626750293] [2024-10-11 19:24:06,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:24:06,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:24:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:24:06,457 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:24:06,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-11 19:24:06,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:24:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:24:06,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 19:24:06,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:06,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:24:11,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2024-10-11 19:24:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:11,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:12,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:24:12,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626750293] [2024-10-11 19:24:12,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626750293] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:12,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:24:12,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2024-10-11 19:24:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687408525] [2024-10-11 19:24:12,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:12,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 19:24:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:24:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 19:24:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552