./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:29:27,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:29:27,433 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:29:27,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:29:27,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:29:27,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:29:27,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:29:27,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:29:27,471 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:29:27,472 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:29:27,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:29:27,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:29:27,473 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:29:27,473 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:29:27,474 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:29:27,474 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:29:27,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:29:27,475 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:29:27,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:29:27,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:29:27,476 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:29:27,476 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:29:27,477 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:29:27,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:29:27,477 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:29:27,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:29:27,478 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:29:27,479 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:29:27,479 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:29:27,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:29:27,480 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:29:27,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:29:27,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:29:27,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:29:27,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:29:27,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:29:27,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:29:27,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:29:27,482 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:29:27,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:29:27,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:29:27,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:29:27,487 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-12 16:29:27,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:29:27,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:29:27,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:29:27,781 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:29:27,781 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:29:27,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-12 16:29:29,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:29:29,435 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:29:29,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-12 16:29:29,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa61dc0a/30ce351f9cd64ce1a85d73bb47310c45/FLAGf9414d387 [2024-11-12 16:29:29,818 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa61dc0a/30ce351f9cd64ce1a85d73bb47310c45 [2024-11-12 16:29:29,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:29:29,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:29:29,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:29:29,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:29:29,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:29:29,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:29" (1/1) ... [2024-11-12 16:29:29,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:29, skipping insertion in model container [2024-11-12 16:29:29,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:29" (1/1) ... [2024-11-12 16:29:29,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:29:30,070 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:29:30,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:29:30,082 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:29:30,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:29:30,149 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:29:30,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30 WrapperNode [2024-11-12 16:29:30,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:29:30,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:29:30,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:29:30,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:29:30,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,211 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 189 [2024-11-12 16:29:30,212 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:29:30,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:29:30,213 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:29:30,214 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:29:30,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,260 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:29:30,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:29:30,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:29:30,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:29:30,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:29:30,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (1/1) ... [2024-11-12 16:29:30,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:29:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:30,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:29:30,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:29:30,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:29:30,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:29:30,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:29:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:29:30,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:29:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:29:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:29:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:29:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:29:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:29:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:29:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:29:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:29:30,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:29:30,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:29:30,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:29:30,392 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:29:30,526 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:29:30,528 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:29:30,889 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:29:30,892 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:29:31,216 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:29:31,216 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 16:29:31,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:31 BoogieIcfgContainer [2024-11-12 16:29:31,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:29:31,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:29:31,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:29:31,224 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:29:31,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:29:29" (1/3) ... [2024-11-12 16:29:31,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645abe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:31, skipping insertion in model container [2024-11-12 16:29:31,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30" (2/3) ... [2024-11-12 16:29:31,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645abe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:31, skipping insertion in model container [2024-11-12 16:29:31,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:31" (3/3) ... [2024-11-12 16:29:31,228 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-12 16:29:31,247 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:29:31,247 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-12 16:29:31,247 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:29:31,307 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:29:31,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-11-12 16:29:31,387 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-11-12 16:29:31,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:29:31,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 137 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-12 16:29:31,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-11-12 16:29:31,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-11-12 16:29:31,407 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:29:31,413 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;@22e654fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:29:31,414 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-12 16:29:31,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:29:31,417 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:29:31,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:29:31,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:31,419 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:29:31,419 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:31,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 576019, now seen corresponding path program 1 times [2024-11-12 16:29:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:31,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698493921] [2024-11-12 16:29:31,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698493921] [2024-11-12 16:29:31,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698493921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:31,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:31,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:29:31,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200257369] [2024-11-12 16:29:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:31,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:31,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:31,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:31,944 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-11-12 16:29:31,944 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:29:31,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 576 events. 299/576 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3105 event pairs, 171 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 985. Up to 443 conditions per place. [2024-11-12 16:29:31,953 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-12 16:29:31,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-11-12 16:29:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-12 16:29:31,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-12 16:29:31,967 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-11-12 16:29:31,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-11-12 16:29:31,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:29:31,973 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-11-12 16:29:31,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-12 16:29:31,978 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-12 16:29:31,978 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-11-12 16:29:31,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:31,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:31,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:29:31,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:29:31,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:31,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 576020, now seen corresponding path program 1 times [2024-11-12 16:29:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305193140] [2024-11-12 16:29:31,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:32,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305193140] [2024-11-12 16:29:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305193140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:32,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:32,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810514942] [2024-11-12 16:29:32,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:32,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:32,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:32,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:32,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:32,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:32,569 INFO L124 PetriNetUnfolderBase]: 300/579 cut-off events. [2024-11-12 16:29:32,569 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:32,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 579 events. 300/579 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3110 event pairs, 171 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1019. Up to 452 conditions per place. [2024-11-12 16:29:32,576 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-12 16:29:32,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 176 flow [2024-11-12 16:29:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-12 16:29:32,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-12 16:29:32,580 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-11-12 16:29:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 176 flow [2024-11-12 16:29:32,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:32,584 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2024-11-12 16:29:32,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-12 16:29:32,585 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-12 16:29:32,586 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2024-11-12 16:29:32,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:32,587 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:32,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:29:32,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:32,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 17857530, now seen corresponding path program 1 times [2024-11-12 16:29:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:32,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612059150] [2024-11-12 16:29:32,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:32,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:32,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612059150] [2024-11-12 16:29:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612059150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:32,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:32,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104856667] [2024-11-12 16:29:32,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:32,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:32,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:32,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:32,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:32,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-11-12 16:29:32,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:32,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-11-12 16:29:32,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:32,864 INFO L124 PetriNetUnfolderBase]: 290/531 cut-off events. [2024-11-12 16:29:32,865 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:32,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 531 events. 290/531 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2620 event pairs, 171 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 976. Up to 433 conditions per place. [2024-11-12 16:29:32,871 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-12 16:29:32,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 181 flow [2024-11-12 16:29:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-12 16:29:32,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-12 16:29:32,873 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 4 states and 94 transitions. [2024-11-12 16:29:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 181 flow [2024-11-12 16:29:32,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:32,876 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 116 flow [2024-11-12 16:29:32,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-12 16:29:32,878 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-12 16:29:32,879 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 116 flow [2024-11-12 16:29:32,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:32,881 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:32,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:29:32,881 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:32,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash 17857531, now seen corresponding path program 1 times [2024-11-12 16:29:32,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:32,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559712454] [2024-11-12 16:29:32,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559712454] [2024-11-12 16:29:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559712454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:32,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:32,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:32,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626861948] [2024-11-12 16:29:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:32,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:32,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:32,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:32,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:32,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:32,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:33,066 INFO L124 PetriNetUnfolderBase]: 274/513 cut-off events. [2024-11-12 16:29:33,066 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:33,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 513 events. 274/513 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2539 event pairs, 153 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 929. Up to 411 conditions per place. [2024-11-12 16:29:33,070 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-12 16:29:33,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 188 flow [2024-11-12 16:29:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-12 16:29:33,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-11-12 16:29:33,071 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 116 flow. Second operand 3 states and 95 transitions. [2024-11-12 16:29:33,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 188 flow [2024-11-12 16:29:33,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:33,084 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 128 flow [2024-11-12 16:29:33,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-12 16:29:33,085 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-12 16:29:33,085 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 128 flow [2024-11-12 16:29:33,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:33,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:33,086 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:33,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:29:33,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:33,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash 17857523, now seen corresponding path program 1 times [2024-11-12 16:29:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:33,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631971495] [2024-11-12 16:29:33,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:33,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:33,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:33,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631971495] [2024-11-12 16:29:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631971495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:33,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407720646] [2024-11-12 16:29:33,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:33,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:29:33,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:33,507 INFO L124 PetriNetUnfolderBase]: 274/512 cut-off events. [2024-11-12 16:29:33,507 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:29:33,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 512 events. 274/512 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2545 event pairs, 153 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 933. Up to 410 conditions per place. [2024-11-12 16:29:33,511 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-12 16:29:33,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2024-11-12 16:29:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-12 16:29:33,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-12 16:29:33,516 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 128 flow. Second operand 5 states and 132 transitions. [2024-11-12 16:29:33,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2024-11-12 16:29:33,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:33,519 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 151 flow [2024-11-12 16:29:33,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-12 16:29:33,520 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:33,521 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 151 flow [2024-11-12 16:29:33,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:33,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:33,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:29:33,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:29:33,522 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:33,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 553573860, now seen corresponding path program 1 times [2024-11-12 16:29:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:33,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235832498] [2024-11-12 16:29:33,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:33,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:33,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235832498] [2024-11-12 16:29:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235832498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163236040] [2024-11-12 16:29:33,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:33,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:29:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:33,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:29:33,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:33,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:29:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:34,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:34,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163236040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:34,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:34,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:29:34,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107051465] [2024-11-12 16:29:34,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:34,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:29:34,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:29:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:29:34,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:34,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 151 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:34,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:34,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:34,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:34,626 INFO L124 PetriNetUnfolderBase]: 274/511 cut-off events. [2024-11-12 16:29:34,626 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:29:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 511 events. 274/511 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2541 event pairs, 153 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 939. Up to 409 conditions per place. [2024-11-12 16:29:34,630 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 27 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-12 16:29:34,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 217 flow [2024-11-12 16:29:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:29:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:29:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-12 16:29:34,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-11-12 16:29:34,633 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 151 flow. Second operand 7 states and 167 transitions. [2024-11-12 16:29:34,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 217 flow [2024-11-12 16:29:34,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:34,634 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 162 flow [2024-11-12 16:29:34,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-12 16:29:34,637 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-12 16:29:34,637 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 162 flow [2024-11-12 16:29:34,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:34,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:34,638 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:29:34,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:29:34,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 16:29:34,839 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:34,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -18771101, now seen corresponding path program 1 times [2024-11-12 16:29:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5716841] [2024-11-12 16:29:34,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5716841] [2024-11-12 16:29:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5716841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707605164] [2024-11-12 16:29:35,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:35,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:35,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:29:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:35,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:29:35,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:35,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:29:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:35,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707605164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:35,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:35,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:29:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157752874] [2024-11-12 16:29:35,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:35,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:29:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:29:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:29:35,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:35,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:35,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:35,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:36,240 INFO L124 PetriNetUnfolderBase]: 276/516 cut-off events. [2024-11-12 16:29:36,241 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-12 16:29:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 516 events. 276/516 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2551 event pairs, 153 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 948. Up to 403 conditions per place. [2024-11-12 16:29:36,245 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 23 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2024-11-12 16:29:36,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 272 flow [2024-11-12 16:29:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:29:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:29:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-11-12 16:29:36,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-11-12 16:29:36,247 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 162 flow. Second operand 9 states and 213 transitions. [2024-11-12 16:29:36,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 272 flow [2024-11-12 16:29:36,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 222 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-12 16:29:36,249 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 176 flow [2024-11-12 16:29:36,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-12 16:29:36,251 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-12 16:29:36,251 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 176 flow [2024-11-12 16:29:36,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:36,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:36,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:29:36,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:29:36,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-12 16:29:36,457 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:36,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -18771093, now seen corresponding path program 1 times [2024-11-12 16:29:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:36,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009420447] [2024-11-12 16:29:36,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:36,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009420447] [2024-11-12 16:29:36,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009420447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:36,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724394804] [2024-11-12 16:29:36,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:36,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:36,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:29:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:36,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:29:36,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:36,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:36,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-12 16:29:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724394804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-12 16:29:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215831946] [2024-11-12 16:29:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:36,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:29:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:29:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:29:36,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:36,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:36,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:36,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:36,989 INFO L124 PetriNetUnfolderBase]: 276/515 cut-off events. [2024-11-12 16:29:36,990 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:29:36,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 515 events. 276/515 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2535 event pairs, 153 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 917. Up to 403 conditions per place. [2024-11-12 16:29:36,993 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-12 16:29:36,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 254 flow [2024-11-12 16:29:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-12 16:29:36,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-12 16:29:36,998 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 176 flow. Second operand 5 states and 135 transitions. [2024-11-12 16:29:36,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 254 flow [2024-11-12 16:29:36,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 223 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:37,000 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 157 flow [2024-11-12 16:29:37,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-12 16:29:37,003 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-12 16:29:37,004 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 157 flow [2024-11-12 16:29:37,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:37,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:37,004 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:37,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:29:37,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:37,209 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:37,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -991081515, now seen corresponding path program 1 times [2024-11-12 16:29:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:37,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234462501] [2024-11-12 16:29:37,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:37,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:37,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234462501] [2024-11-12 16:29:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234462501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:37,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918039306] [2024-11-12 16:29:37,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:37,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:37,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:37,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:29:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:37,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 16:29:37,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:37,457 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:29:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918039306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:29:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-12 16:29:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410034616] [2024-11-12 16:29:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:37,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:29:37,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:37,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:37,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:37,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:37,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:37,621 INFO L124 PetriNetUnfolderBase]: 537/888 cut-off events. [2024-11-12 16:29:37,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:29:37,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 888 events. 537/888 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4659 event pairs, 136 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1702. Up to 486 conditions per place. [2024-11-12 16:29:37,627 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-12 16:29:37,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 326 flow [2024-11-12 16:29:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-12 16:29:37,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-11-12 16:29:37,629 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 157 flow. Second operand 4 states and 123 transitions. [2024-11-12 16:29:37,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 326 flow [2024-11-12 16:29:37,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:37,631 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 163 flow [2024-11-12 16:29:37,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-12 16:29:37,632 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:37,632 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 163 flow [2024-11-12 16:29:37,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:37,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:37,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:37,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:29:37,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:37,838 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:37,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1053420534, now seen corresponding path program 1 times [2024-11-12 16:29:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:37,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309737302] [2024-11-12 16:29:37,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:37,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:37,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:37,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309737302] [2024-11-12 16:29:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309737302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:37,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:37,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641001996] [2024-11-12 16:29:37,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:37,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:37,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:37,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 163 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) [2024-11-12 16:29:37,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:37,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:38,084 INFO L124 PetriNetUnfolderBase]: 482/938 cut-off events. [2024-11-12 16:29:38,085 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-12 16:29:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 938 events. 482/938 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5477 event pairs, 312 based on Foata normal form. 27/707 useless extension candidates. Maximal degree in co-relation 1514. Up to 664 conditions per place. [2024-11-12 16:29:38,090 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2024-11-12 16:29:38,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 366 flow [2024-11-12 16:29:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-12 16:29:38,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-11-12 16:29:38,091 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 163 flow. Second operand 4 states and 139 transitions. [2024-11-12 16:29:38,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 366 flow [2024-11-12 16:29:38,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:38,094 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 180 flow [2024-11-12 16:29:38,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-12 16:29:38,095 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-12 16:29:38,095 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 180 flow [2024-11-12 16:29:38,095 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) [2024-11-12 16:29:38,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:38,095 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:38,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:29:38,096 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:38,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142427, now seen corresponding path program 1 times [2024-11-12 16:29:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:38,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111839884] [2024-11-12 16:29:38,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111839884] [2024-11-12 16:29:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111839884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:38,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:29:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428561074] [2024-11-12 16:29:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:38,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:29:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:29:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:29:38,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-12 16:29:38,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:38,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:38,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-12 16:29:38,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:38,383 INFO L124 PetriNetUnfolderBase]: 417/823 cut-off events. [2024-11-12 16:29:38,383 INFO L125 PetriNetUnfolderBase]: For 79/103 co-relation queries the response was YES. [2024-11-12 16:29:38,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 823 events. 417/823 cut-off events. For 79/103 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4575 event pairs, 279 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1483. Up to 676 conditions per place. [2024-11-12 16:29:38,388 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-12 16:29:38,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 252 flow [2024-11-12 16:29:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-12 16:29:38,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-12 16:29:38,389 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 180 flow. Second operand 5 states and 120 transitions. [2024-11-12 16:29:38,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 252 flow [2024-11-12 16:29:38,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:38,391 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 179 flow [2024-11-12 16:29:38,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-12 16:29:38,392 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-12 16:29:38,393 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 179 flow [2024-11-12 16:29:38,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:38,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:38,393 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:38,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:29:38,393 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:38,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142426, now seen corresponding path program 1 times [2024-11-12 16:29:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:38,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617443057] [2024-11-12 16:29:38,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:38,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:38,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617443057] [2024-11-12 16:29:38,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617443057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:38,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:38,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:38,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331687268] [2024-11-12 16:29:38,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:38,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:38,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:29:38,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:38,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:38,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:38,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:38,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:38,729 INFO L124 PetriNetUnfolderBase]: 260/580 cut-off events. [2024-11-12 16:29:38,730 INFO L125 PetriNetUnfolderBase]: For 82/94 co-relation queries the response was YES. [2024-11-12 16:29:38,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 580 events. 260/580 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3191 event pairs, 174 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 866. Up to 449 conditions per place. [2024-11-12 16:29:38,733 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-12 16:29:38,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 245 flow [2024-11-12 16:29:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-12 16:29:38,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-11-12 16:29:38,735 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 179 flow. Second operand 4 states and 103 transitions. [2024-11-12 16:29:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 245 flow [2024-11-12 16:29:38,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:38,738 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2024-11-12 16:29:38,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-12 16:29:38,739 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:38,741 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2024-11-12 16:29:38,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:38,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:38,741 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:38,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:29:38,742 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:38,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1275096547, now seen corresponding path program 1 times [2024-11-12 16:29:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360114184] [2024-11-12 16:29:38,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360114184] [2024-11-12 16:29:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360114184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534944756] [2024-11-12 16:29:38,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:38,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:38,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:38,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:38,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:29:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:38,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:29:38,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:39,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534944756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:39,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-12 16:29:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916842370] [2024-11-12 16:29:39,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:39,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:29:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:29:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:29:39,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:39,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:39,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:39,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:39,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:39,538 INFO L124 PetriNetUnfolderBase]: 444/924 cut-off events. [2024-11-12 16:29:39,539 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-12 16:29:39,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 924 events. 444/924 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5395 event pairs, 140 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 1417. Up to 218 conditions per place. [2024-11-12 16:29:39,543 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-11-12 16:29:39,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 481 flow [2024-11-12 16:29:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:29:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:29:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-12 16:29:39,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5231560891938251 [2024-11-12 16:29:39,545 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 11 states and 305 transitions. [2024-11-12 16:29:39,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 481 flow [2024-11-12 16:29:39,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:39,548 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 219 flow [2024-11-12 16:29:39,548 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-12 16:29:39,548 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-12 16:29:39,549 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 219 flow [2024-11-12 16:29:39,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:39,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:39,549 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:39,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:29:39,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-12 16:29:39,754 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:39,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 279846285, now seen corresponding path program 2 times [2024-11-12 16:29:39,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:39,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775944250] [2024-11-12 16:29:39,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775944250] [2024-11-12 16:29:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775944250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309533267] [2024-11-12 16:29:40,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:40,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:40,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:40,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:29:40,099 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:29:40,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:40,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:29:40,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:40,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:40,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-12 16:29:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:40,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309533267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:40,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:40,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-12 16:29:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157741554] [2024-11-12 16:29:40,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:40,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:29:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:29:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:29:40,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:40,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:40,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:40,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:40,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:41,368 INFO L124 PetriNetUnfolderBase]: 626/1236 cut-off events. [2024-11-12 16:29:41,368 INFO L125 PetriNetUnfolderBase]: For 268/284 co-relation queries the response was YES. [2024-11-12 16:29:41,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 1236 events. 626/1236 cut-off events. For 268/284 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7327 event pairs, 184 based on Foata normal form. 56/1182 useless extension candidates. Maximal degree in co-relation 2011. Up to 242 conditions per place. [2024-11-12 16:29:41,375 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2024-11-12 16:29:41,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 532 flow [2024-11-12 16:29:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:29:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:29:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-11-12 16:29:41,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5056603773584906 [2024-11-12 16:29:41,378 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 219 flow. Second operand 10 states and 268 transitions. [2024-11-12 16:29:41,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 532 flow [2024-11-12 16:29:41,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:41,381 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 251 flow [2024-11-12 16:29:41,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2024-11-12 16:29:41,382 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-12 16:29:41,382 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 251 flow [2024-11-12 16:29:41,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:41,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:41,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:41,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:29:41,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:41,588 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:41,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 304723119, now seen corresponding path program 1 times [2024-11-12 16:29:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813471064] [2024-11-12 16:29:41,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:41,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813471064] [2024-11-12 16:29:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813471064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:41,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879579381] [2024-11-12 16:29:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:41,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:41,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:41,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:41,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:41,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:41,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:41,807 INFO L124 PetriNetUnfolderBase]: 518/1068 cut-off events. [2024-11-12 16:29:41,807 INFO L125 PetriNetUnfolderBase]: For 654/670 co-relation queries the response was YES. [2024-11-12 16:29:41,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1068 events. 518/1068 cut-off events. For 654/670 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6192 event pairs, 140 based on Foata normal form. 32/996 useless extension candidates. Maximal degree in co-relation 1808. Up to 565 conditions per place. [2024-11-12 16:29:41,816 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-12 16:29:41,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 376 flow [2024-11-12 16:29:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-12 16:29:41,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-12 16:29:41,818 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 251 flow. Second operand 4 states and 118 transitions. [2024-11-12 16:29:41,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 376 flow [2024-11-12 16:29:41,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 341 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:41,821 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 218 flow [2024-11-12 16:29:41,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-11-12 16:29:41,823 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-11-12 16:29:41,823 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 218 flow [2024-11-12 16:29:41,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:41,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:41,824 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:41,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:29:41,824 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:41,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1424963627, now seen corresponding path program 3 times [2024-11-12 16:29:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:41,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904084597] [2024-11-12 16:29:41,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:41,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904084597] [2024-11-12 16:29:41,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904084597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:41,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289288601] [2024-11-12 16:29:41,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:29:41,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:41,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:41,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:29:42,023 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:29:42,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:42,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:29:42,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:29:42,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:42,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-12 16:29:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:29:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289288601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:42,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-12 16:29:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533169815] [2024-11-12 16:29:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:42,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:29:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:29:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:29:42,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 218 flow. Second operand has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:43,374 INFO L124 PetriNetUnfolderBase]: 948/1740 cut-off events. [2024-11-12 16:29:43,374 INFO L125 PetriNetUnfolderBase]: For 691/701 co-relation queries the response was YES. [2024-11-12 16:29:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1740 events. 948/1740 cut-off events. For 691/701 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10282 event pairs, 264 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 3070. Up to 376 conditions per place. [2024-11-12 16:29:43,405 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 29 changer transitions 0/125 dead transitions. [2024-11-12 16:29:43,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 681 flow [2024-11-12 16:29:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:29:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:29:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 435 transitions. [2024-11-12 16:29:43,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43197616683217477 [2024-11-12 16:29:43,407 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 218 flow. Second operand 19 states and 435 transitions. [2024-11-12 16:29:43,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 681 flow [2024-11-12 16:29:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 657 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:43,411 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 323 flow [2024-11-12 16:29:43,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=323, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2024-11-12 16:29:43,412 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-11-12 16:29:43,412 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 323 flow [2024-11-12 16:29:43,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:43,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:43,413 INFO L206 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] [2024-11-12 16:29:43,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:29:43,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:43,613 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:43,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash -765741387, now seen corresponding path program 1 times [2024-11-12 16:29:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:43,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210788410] [2024-11-12 16:29:43,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:43,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:43,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210788410] [2024-11-12 16:29:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210788410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:43,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:43,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286742950] [2024-11-12 16:29:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:43,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:43,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:43,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:43,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:43,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:43,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:43,859 INFO L124 PetriNetUnfolderBase]: 833/1728 cut-off events. [2024-11-12 16:29:43,859 INFO L125 PetriNetUnfolderBase]: For 1581/1605 co-relation queries the response was YES. [2024-11-12 16:29:43,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1728 events. 833/1728 cut-off events. For 1581/1605 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11252 event pairs, 372 based on Foata normal form. 6/1550 useless extension candidates. Maximal degree in co-relation 3251. Up to 891 conditions per place. [2024-11-12 16:29:43,868 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 62 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2024-11-12 16:29:43,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 562 flow [2024-11-12 16:29:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-12 16:29:43,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-12 16:29:43,870 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 323 flow. Second operand 3 states and 100 transitions. [2024-11-12 16:29:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 562 flow [2024-11-12 16:29:43,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 502 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-12 16:29:43,876 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 275 flow [2024-11-12 16:29:43,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-11-12 16:29:43,877 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-12 16:29:43,877 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 275 flow [2024-11-12 16:29:43,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:43,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:43,877 INFO L206 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, 1, 1, 1] [2024-11-12 16:29:43,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:29:43,878 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:43,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1032067254, now seen corresponding path program 1 times [2024-11-12 16:29:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353001787] [2024-11-12 16:29:43,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353001787] [2024-11-12 16:29:43,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353001787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:43,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:43,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785130100] [2024-11-12 16:29:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:43,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:43,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:43,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:43,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:43,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:43,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:43,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:44,124 INFO L124 PetriNetUnfolderBase]: 703/1430 cut-off events. [2024-11-12 16:29:44,125 INFO L125 PetriNetUnfolderBase]: For 1033/1063 co-relation queries the response was YES. [2024-11-12 16:29:44,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 1430 events. 703/1430 cut-off events. For 1033/1063 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8578 event pairs, 274 based on Foata normal form. 32/1344 useless extension candidates. Maximal degree in co-relation 3754. Up to 906 conditions per place. [2024-11-12 16:29:44,132 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 55 selfloop transitions, 2 changer transitions 9/77 dead transitions. [2024-11-12 16:29:44,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 503 flow [2024-11-12 16:29:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-12 16:29:44,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-11-12 16:29:44,134 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 275 flow. Second operand 3 states and 99 transitions. [2024-11-12 16:29:44,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 503 flow [2024-11-12 16:29:44,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:44,144 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 284 flow [2024-11-12 16:29:44,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-12 16:29:44,145 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-12 16:29:44,145 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 284 flow [2024-11-12 16:29:44,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:44,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:44,145 INFO L206 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, 1, 1, 1, 1, 1] [2024-11-12 16:29:44,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:29:44,146 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:44,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1067175515, now seen corresponding path program 1 times [2024-11-12 16:29:44,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506056294] [2024-11-12 16:29:44,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506056294] [2024-11-12 16:29:44,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506056294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451412367] [2024-11-12 16:29:44,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:44,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:29:44,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:29:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:44,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 16:29:44,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:45,033 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 15 treesize of output 1 [2024-11-12 16:29:45,269 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-12 16:29:45,270 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 34 treesize of output 10 [2024-11-12 16:29:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:45,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:57,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:57,966 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 154 treesize of output 150 [2024-11-12 16:29:57,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:57,984 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 44 treesize of output 40 [2024-11-12 16:29:58,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:58,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 238 [2024-11-12 16:29:59,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:59,362 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 72 treesize of output 75 [2024-11-12 16:29:59,409 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-12 16:29:59,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2024-11-12 16:29:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:29:59,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451412367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:59,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:59,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2024-11-12 16:29:59,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800756258] [2024-11-12 16:29:59,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:59,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 16:29:59,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 16:29:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2024-11-12 16:30:03,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:07,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:11,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:15,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:19,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:23,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:27,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:31,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:35,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:39,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:43,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:47,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:51,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:55,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:59,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:59,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2024-11-12 16:30:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 284 flow. Second operand has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:30:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:30:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2024-11-12 16:30:59,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:02,175 INFO L124 PetriNetUnfolderBase]: 3670/6492 cut-off events. [2024-11-12 16:31:02,175 INFO L125 PetriNetUnfolderBase]: For 5286/5286 co-relation queries the response was YES. [2024-11-12 16:31:02,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18223 conditions, 6492 events. 3670/6492 cut-off events. For 5286/5286 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 41868 event pairs, 49 based on Foata normal form. 6/5724 useless extension candidates. Maximal degree in co-relation 13086. Up to 1155 conditions per place. [2024-11-12 16:31:02,219 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 234 selfloop transitions, 53 changer transitions 144/434 dead transitions. [2024-11-12 16:31:02,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 434 transitions, 2876 flow [2024-11-12 16:31:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 16:31:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-12 16:31:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 492 transitions. [2024-11-12 16:31:02,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28130360205831906 [2024-11-12 16:31:02,225 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 284 flow. Second operand 33 states and 492 transitions. [2024-11-12 16:31:02,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 434 transitions, 2876 flow [2024-11-12 16:31:02,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 434 transitions, 2815 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:02,243 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 794 flow [2024-11-12 16:31:02,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=794, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-11-12 16:31:02,244 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-11-12 16:31:02,244 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 794 flow [2024-11-12 16:31:02,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:02,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:02,245 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-12 16:31:02,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:31:02,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:02,449 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:31:02,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1436932370, now seen corresponding path program 2 times [2024-11-12 16:31:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199887489] [2024-11-12 16:31:02,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:31:02,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199887489] [2024-11-12 16:31:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199887489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808480614] [2024-11-12 16:31:02,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:31:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:02,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:31:02,673 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:31:02,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:31:02,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:31:02,677 INFO L279 TraceCheckSpWp]: Computing forward predicates...