./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 3061b6dc 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-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:51:32,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:51:32,664 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:51:32,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:51:32,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:51:32,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:51:32,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:51:32,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:51:32,703 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:51:32,705 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:51:32,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:51:32,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:51:32,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:51:32,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:51:32,710 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:51:32,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:51:32,711 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:51:32,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:51:32,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:51:32,712 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:51:32,712 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:51:32,712 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:51:32,712 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:51:32,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:51:32,713 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:51:32,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:51:32,713 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:51:32,713 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:51:32,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:51:32,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:51:32,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:51:32,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:51:32,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:51:32,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:32,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:51:32,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:51:32,715 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:51:32,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:51:32,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:51:32,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:51:32,716 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:51:32,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:51:32,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-19 09:51:32,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:51:32,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:51:32,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:51:32,993 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:51:32,993 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:51:32,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-19 09:51:34,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:51:34,673 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:51:34,674 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-19 09:51:34,681 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3fe20d2/c718526193124980a6c5ded3ff397599/FLAG20e14aa8e [2024-11-19 09:51:34,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3fe20d2/c718526193124980a6c5ded3ff397599 [2024-11-19 09:51:34,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:51:34,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:51:34,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:34,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:51:34,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:51:34,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:34" (1/1) ... [2024-11-19 09:51:34,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb279fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:34, skipping insertion in model container [2024-11-19 09:51:34,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:34" (1/1) ... [2024-11-19 09:51:34,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:51:34,996 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:51:35,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:35,013 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:51:35,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:35,063 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:51:35,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35 WrapperNode [2024-11-19 09:51:35,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:35,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:35,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:51:35,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:51:35,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,110 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 189 [2024-11-19 09:51:35,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:35,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:51:35,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:51:35,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:51:35,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,126 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,147 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]. [2024-11-19 09:51:35,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,157 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:51:35,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:51:35,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:51:35,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:51:35,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (1/1) ... [2024-11-19 09:51:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:35,202 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) [2024-11-19 09:51:35,204 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 [2024-11-19 09:51:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:51:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:51:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:51:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:51:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:51:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:51:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:51:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:51:35,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:51:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:51:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:51:35,250 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:51:35,357 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:51:35,359 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:51:35,726 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:51:35,727 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:51:36,006 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:51:36,006 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:51:36,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:36 BoogieIcfgContainer [2024-11-19 09:51:36,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:51:36,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:51:36,011 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:51:36,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:51:36,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:51:34" (1/3) ... [2024-11-19 09:51:36,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e2f6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:36, skipping insertion in model container [2024-11-19 09:51:36,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:35" (2/3) ... [2024-11-19 09:51:36,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e2f6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:36, skipping insertion in model container [2024-11-19 09:51:36,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:36" (3/3) ... [2024-11-19 09:51:36,017 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-19 09:51:36,038 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:51:36,039 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-19 09:51:36,039 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:51:36,100 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:51:36,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-11-19 09:51:36,179 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-11-19 09:51:36,181 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:51:36,185 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. [2024-11-19 09:51:36,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-11-19 09:51:36,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-11-19 09:51:36,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:51:36,217 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;@7f85a253, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:51:36,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-19 09:51:36,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:51:36,224 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:51:36,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:36,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:36,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:36,226 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:36,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 576019, now seen corresponding path program 1 times [2024-11-19 09:51:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:36,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038634156] [2024-11-19 09:51:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:36,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038634156] [2024-11-19 09:51:36,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038634156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:36,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:36,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:51:36,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434956260] [2024-11-19 09:51:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:36,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:36,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:36,618 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) [2024-11-19 09:51:36,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:36,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:36,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:36,851 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-11-19 09:51:36,852 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:51:36,854 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. [2024-11-19 09:51:36,859 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-19 09:51:36,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-11-19 09:51:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-19 09:51:36,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-19 09:51:36,876 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-11-19 09:51:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-11-19 09:51:36,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:36,883 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-11-19 09:51:36,885 INFO L260 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} [2024-11-19 09:51:36,891 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-19 09:51:36,891 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-11-19 09:51:36,891 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) [2024-11-19 09:51:36,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:36,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:36,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:51:36,893 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:36,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 576020, now seen corresponding path program 1 times [2024-11-19 09:51:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:36,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831046043] [2024-11-19 09:51:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:37,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831046043] [2024-11-19 09:51:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831046043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:37,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:37,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440004293] [2024-11-19 09:51:37,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:37,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:37,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:37,264 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) [2024-11-19 09:51:37,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:37,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:37,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:37,431 INFO L124 PetriNetUnfolderBase]: 300/579 cut-off events. [2024-11-19 09:51:37,431 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:51:37,434 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. [2024-11-19 09:51:37,440 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-19 09:51:37,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 176 flow [2024-11-19 09:51:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-19 09:51:37,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-19 09:51:37,443 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-11-19 09:51:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 176 flow [2024-11-19 09:51:37,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:37,445 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2024-11-19 09:51:37,446 INFO L260 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} [2024-11-19 09:51:37,446 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-19 09:51:37,447 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2024-11-19 09:51:37,447 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) [2024-11-19 09:51:37,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:37,447 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:51:37,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:51:37,448 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash 17857530, now seen corresponding path program 1 times [2024-11-19 09:51:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547058311] [2024-11-19 09:51:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:37,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:37,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547058311] [2024-11-19 09:51:37,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547058311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:37,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:37,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:37,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011501009] [2024-11-19 09:51:37,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:37,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:37,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-11-19 09:51:37,603 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) [2024-11-19 09:51:37,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:37,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-11-19 09:51:37,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:37,726 INFO L124 PetriNetUnfolderBase]: 290/531 cut-off events. [2024-11-19 09:51:37,727 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:51:37,728 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. [2024-11-19 09:51:37,732 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-19 09:51:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 181 flow [2024-11-19 09:51:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-19 09:51:37,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-19 09:51:37,734 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 4 states and 94 transitions. [2024-11-19 09:51:37,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 181 flow [2024-11-19 09:51:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:37,736 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 116 flow [2024-11-19 09:51:37,737 INFO L260 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} [2024-11-19 09:51:37,737 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-19 09:51:37,738 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 116 flow [2024-11-19 09:51:37,738 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) [2024-11-19 09:51:37,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:37,738 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:51:37,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:51:37,739 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:37,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 17857531, now seen corresponding path program 1 times [2024-11-19 09:51:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759342611] [2024-11-19 09:51:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759342611] [2024-11-19 09:51:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759342611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:37,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083105037] [2024-11-19 09:51:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:37,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:37,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:51:37,833 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) [2024-11-19 09:51:37,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:37,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:51:37,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:37,923 INFO L124 PetriNetUnfolderBase]: 274/513 cut-off events. [2024-11-19 09:51:37,924 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:51:37,925 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. [2024-11-19 09:51:37,927 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-19 09:51:37,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 188 flow [2024-11-19 09:51:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-19 09:51:37,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-11-19 09:51:37,930 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 116 flow. Second operand 3 states and 95 transitions. [2024-11-19 09:51:37,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 188 flow [2024-11-19 09:51:37,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:37,932 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 128 flow [2024-11-19 09:51:37,932 INFO L260 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} [2024-11-19 09:51:37,932 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-19 09:51:37,933 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 128 flow [2024-11-19 09:51:37,933 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) [2024-11-19 09:51:37,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:37,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:51:37,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:51:37,935 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:37,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 17857523, now seen corresponding path program 1 times [2024-11-19 09:51:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769130927] [2024-11-19 09:51:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:37,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769130927] [2024-11-19 09:51:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769130927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514538299] [2024-11-19 09:51:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:38,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:38,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:38,155 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) [2024-11-19 09:51:38,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:38,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:38,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:38,301 INFO L124 PetriNetUnfolderBase]: 274/512 cut-off events. [2024-11-19 09:51:38,301 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:51:38,302 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. [2024-11-19 09:51:38,305 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-19 09:51:38,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2024-11-19 09:51:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-19 09:51:38,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-19 09:51:38,307 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 128 flow. Second operand 5 states and 132 transitions. [2024-11-19 09:51:38,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2024-11-19 09:51:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:38,309 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 151 flow [2024-11-19 09:51:38,309 INFO L260 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} [2024-11-19 09:51:38,310 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-19 09:51:38,310 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 151 flow [2024-11-19 09:51:38,311 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) [2024-11-19 09:51:38,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:38,311 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:51:38,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:51:38,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:38,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 553573860, now seen corresponding path program 1 times [2024-11-19 09:51:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372868124] [2024-11-19 09:51:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:38,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:38,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372868124] [2024-11-19 09:51:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372868124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610590020] [2024-11-19 09:51:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:38,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:38,543 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) [2024-11-19 09:51:38,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:51:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:38,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:51:38,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:38,701 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 [2024-11-19 09:51:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:38,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:39,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610590020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:39,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:51:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541995367] [2024-11-19 09:51:39,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:39,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:39,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:39,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:39,248 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) [2024-11-19 09:51:39,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:39,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:39,448 INFO L124 PetriNetUnfolderBase]: 274/511 cut-off events. [2024-11-19 09:51:39,448 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:39,449 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. [2024-11-19 09:51:39,452 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 27 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-19 09:51:39,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 217 flow [2024-11-19 09:51:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-19 09:51:39,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-11-19 09:51:39,454 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 151 flow. Second operand 7 states and 167 transitions. [2024-11-19 09:51:39,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 217 flow [2024-11-19 09:51:39,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:39,456 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 162 flow [2024-11-19 09:51:39,456 INFO L260 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} [2024-11-19 09:51:39,459 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-19 09:51:39,460 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 162 flow [2024-11-19 09:51:39,460 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) [2024-11-19 09:51:39,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:39,460 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:51:39,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:39,664 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 [2024-11-19 09:51:39,665 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:39,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -18771101, now seen corresponding path program 1 times [2024-11-19 09:51:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:39,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318058486] [2024-11-19 09:51:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:39,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:39,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318058486] [2024-11-19 09:51:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318058486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591211928] [2024-11-19 09:51:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:39,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:39,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:39,921 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) [2024-11-19 09:51:39,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:51:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:39,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:51:39,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:40,005 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 [2024-11-19 09:51:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:40,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591211928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:40,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:40,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:51:40,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118398417] [2024-11-19 09:51:40,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:40,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:40,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:40,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:40,603 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) [2024-11-19 09:51:40,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:40,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:40,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:41,023 INFO L124 PetriNetUnfolderBase]: 276/516 cut-off events. [2024-11-19 09:51:41,023 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-19 09:51:41,024 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. [2024-11-19 09:51:41,027 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 23 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2024-11-19 09:51:41,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 272 flow [2024-11-19 09:51:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-11-19 09:51:41,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-11-19 09:51:41,030 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 162 flow. Second operand 9 states and 213 transitions. [2024-11-19 09:51:41,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 272 flow [2024-11-19 09:51:41,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 222 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-19 09:51:41,035 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 176 flow [2024-11-19 09:51:41,036 INFO L260 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} [2024-11-19 09:51:41,036 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-19 09:51:41,036 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 176 flow [2024-11-19 09:51:41,037 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) [2024-11-19 09:51:41,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:41,037 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:51:41,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:51:41,237 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 [2024-11-19 09:51:41,238 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:41,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -18771093, now seen corresponding path program 1 times [2024-11-19 09:51:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124176567] [2024-11-19 09:51:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124176567] [2024-11-19 09:51:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124176567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794758176] [2024-11-19 09:51:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:41,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:41,336 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) [2024-11-19 09:51:41,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:51:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:51:41,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:41,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:41,458 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 [2024-11-19 09:51:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:41,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794758176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:41,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:41,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 09:51:41,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369561361] [2024-11-19 09:51:41,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:41,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:51:41,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:41,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:51:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:51:41,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-19 09:51:41,597 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) [2024-11-19 09:51:41,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:41,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-19 09:51:41,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:41,759 INFO L124 PetriNetUnfolderBase]: 276/515 cut-off events. [2024-11-19 09:51:41,760 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:51:41,760 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. [2024-11-19 09:51:41,763 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-19 09:51:41,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 254 flow [2024-11-19 09:51:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-19 09:51:41,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-19 09:51:41,764 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 176 flow. Second operand 5 states and 135 transitions. [2024-11-19 09:51:41,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 254 flow [2024-11-19 09:51:41,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 223 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:51:41,766 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 157 flow [2024-11-19 09:51:41,766 INFO L260 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} [2024-11-19 09:51:41,767 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-19 09:51:41,767 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 157 flow [2024-11-19 09:51:41,768 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) [2024-11-19 09:51:41,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:41,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:41,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:51:41,972 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 [2024-11-19 09:51:41,973 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:41,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash -991081515, now seen corresponding path program 1 times [2024-11-19 09:51:41,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950779985] [2024-11-19 09:51:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950779985] [2024-11-19 09:51:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950779985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162469108] [2024-11-19 09:51:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:42,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:42,094 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) [2024-11-19 09:51:42,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:51:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:51:42,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:42,212 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:51:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162469108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:42,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:51:42,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-19 09:51:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933978626] [2024-11-19 09:51:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:42,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:51:42,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-19 09:51:42,237 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) [2024-11-19 09:51:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-19 09:51:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:42,361 INFO L124 PetriNetUnfolderBase]: 537/888 cut-off events. [2024-11-19 09:51:42,361 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:51:42,362 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. [2024-11-19 09:51:42,366 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-19 09:51:42,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 326 flow [2024-11-19 09:51:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-19 09:51:42,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-11-19 09:51:42,368 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 157 flow. Second operand 4 states and 123 transitions. [2024-11-19 09:51:42,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 326 flow [2024-11-19 09:51:42,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:42,370 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 163 flow [2024-11-19 09:51:42,370 INFO L260 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} [2024-11-19 09:51:42,371 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-19 09:51:42,371 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 163 flow [2024-11-19 09:51:42,371 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) [2024-11-19 09:51:42,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:42,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:42,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:51:42,575 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 [2024-11-19 09:51:42,576 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:42,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1053420534, now seen corresponding path program 1 times [2024-11-19 09:51:42,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:42,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186752162] [2024-11-19 09:51:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186752162] [2024-11-19 09:51:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186752162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:42,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644580164] [2024-11-19 09:51:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:42,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:42,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:51:42,667 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) [2024-11-19 09:51:42,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:42,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:51:42,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:42,826 INFO L124 PetriNetUnfolderBase]: 482/938 cut-off events. [2024-11-19 09:51:42,826 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-19 09:51:42,827 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. [2024-11-19 09:51:42,832 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2024-11-19 09:51:42,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 366 flow [2024-11-19 09:51:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-19 09:51:42,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-11-19 09:51:42,833 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 163 flow. Second operand 4 states and 139 transitions. [2024-11-19 09:51:42,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 366 flow [2024-11-19 09:51:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:42,836 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 180 flow [2024-11-19 09:51:42,837 INFO L260 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} [2024-11-19 09:51:42,838 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-19 09:51:42,838 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 180 flow [2024-11-19 09:51:42,838 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) [2024-11-19 09:51:42,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:42,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:42,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:51:42,839 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:42,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142427, now seen corresponding path program 1 times [2024-11-19 09:51:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:42,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341882385] [2024-11-19 09:51:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:42,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:42,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341882385] [2024-11-19 09:51:42,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341882385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:42,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:42,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:51:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484918636] [2024-11-19 09:51:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:42,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:51:43,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-19 09:51:43,008 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) [2024-11-19 09:51:43,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:43,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-19 09:51:43,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,130 INFO L124 PetriNetUnfolderBase]: 417/823 cut-off events. [2024-11-19 09:51:43,130 INFO L125 PetriNetUnfolderBase]: For 79/103 co-relation queries the response was YES. [2024-11-19 09:51:43,131 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. [2024-11-19 09:51:43,135 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-19 09:51:43,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 252 flow [2024-11-19 09:51:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-19 09:51:43,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-19 09:51:43,137 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 180 flow. Second operand 5 states and 120 transitions. [2024-11-19 09:51:43,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 252 flow [2024-11-19 09:51:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:43,139 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 179 flow [2024-11-19 09:51:43,139 INFO L260 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} [2024-11-19 09:51:43,139 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-19 09:51:43,140 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 179 flow [2024-11-19 09:51:43,140 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) [2024-11-19 09:51:43,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:43,140 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:43,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:51:43,140 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:43,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142426, now seen corresponding path program 1 times [2024-11-19 09:51:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397989055] [2024-11-19 09:51:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397989055] [2024-11-19 09:51:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397989055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:43,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68509041] [2024-11-19 09:51:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:43,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:43,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-19 09:51:43,399 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) [2024-11-19 09:51:43,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:43,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-19 09:51:43,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,483 INFO L124 PetriNetUnfolderBase]: 260/580 cut-off events. [2024-11-19 09:51:43,483 INFO L125 PetriNetUnfolderBase]: For 82/94 co-relation queries the response was YES. [2024-11-19 09:51:43,484 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. [2024-11-19 09:51:43,486 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-19 09:51:43,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 245 flow [2024-11-19 09:51:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-19 09:51:43,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-11-19 09:51:43,488 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 179 flow. Second operand 4 states and 103 transitions. [2024-11-19 09:51:43,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 245 flow [2024-11-19 09:51:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:43,489 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2024-11-19 09:51:43,489 INFO L260 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} [2024-11-19 09:51:43,490 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-19 09:51:43,490 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2024-11-19 09:51:43,490 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) [2024-11-19 09:51:43,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:43,491 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:43,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:51:43,491 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:43,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1275096547, now seen corresponding path program 1 times [2024-11-19 09:51:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23263919] [2024-11-19 09:51:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23263919] [2024-11-19 09:51:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23263919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361310686] [2024-11-19 09:51:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:43,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:43,582 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) [2024-11-19 09:51:43,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:51:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:43,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:43,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:43,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361310686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:43,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:43,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-19 09:51:43,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686426656] [2024-11-19 09:51:43,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:43,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:51:43,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:51:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:51:43,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-19 09:51:43,968 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) [2024-11-19 09:51:43,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:43,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-19 09:51:43,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:44,266 INFO L124 PetriNetUnfolderBase]: 444/924 cut-off events. [2024-11-19 09:51:44,267 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-19 09:51:44,269 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. [2024-11-19 09:51:44,272 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-11-19 09:51:44,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 481 flow [2024-11-19 09:51:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:51:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:51:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-19 09:51:44,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231560891938251 [2024-11-19 09:51:44,274 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 11 states and 305 transitions. [2024-11-19 09:51:44,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 481 flow [2024-11-19 09:51:44,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:44,277 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 219 flow [2024-11-19 09:51:44,277 INFO L260 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} [2024-11-19 09:51:44,278 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-19 09:51:44,278 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 219 flow [2024-11-19 09:51:44,278 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) [2024-11-19 09:51:44,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:44,278 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:44,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:51:44,479 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 [2024-11-19 09:51:44,479 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:44,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash 279846285, now seen corresponding path program 2 times [2024-11-19 09:51:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:44,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322647351] [2024-11-19 09:51:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:44,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:44,509 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:44,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:51:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322647351] [2024-11-19 09:51:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322647351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486803096] [2024-11-19 09:51:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:44,757 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) [2024-11-19 09:51:44,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:51:44,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:44,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:44,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:51:44,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:44,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:45,105 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 [2024-11-19 09:51:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486803096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:45,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:45,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-19 09:51:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067799974] [2024-11-19 09:51:45,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:45,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:51:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:51:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:51:45,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-11-19 09:51:45,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 219 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 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) [2024-11-19 09:51:45,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:45,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-11-19 09:51:45,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:46,511 INFO L124 PetriNetUnfolderBase]: 692/1322 cut-off events. [2024-11-19 09:51:46,511 INFO L125 PetriNetUnfolderBase]: For 279/289 co-relation queries the response was YES. [2024-11-19 09:51:46,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1322 events. 692/1322 cut-off events. For 279/289 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7665 event pairs, 220 based on Foata normal form. 72/1285 useless extension candidates. Maximal degree in co-relation 2176. Up to 280 conditions per place. [2024-11-19 09:51:46,518 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 82 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-11-19 09:51:46,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 103 transitions, 546 flow [2024-11-19 09:51:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:51:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:51:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 309 transitions. [2024-11-19 09:51:46,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44847605224963716 [2024-11-19 09:51:46,520 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 219 flow. Second operand 13 states and 309 transitions. [2024-11-19 09:51:46,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 103 transitions, 546 flow [2024-11-19 09:51:46,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:46,523 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 236 flow [2024-11-19 09:51:46,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=236, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-11-19 09:51:46,524 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-19 09:51:46,524 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 236 flow [2024-11-19 09:51:46,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 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) [2024-11-19 09:51:46,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:46,524 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:46,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:51:46,728 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 [2024-11-19 09:51:46,729 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:46,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 304723119, now seen corresponding path program 1 times [2024-11-19 09:51:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921835935] [2024-11-19 09:51:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:46,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921835935] [2024-11-19 09:51:46,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921835935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:46,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:46,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:46,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9768868] [2024-11-19 09:51:46,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:46,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:46,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-19 09:51:46,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 236 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) [2024-11-19 09:51:46,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:46,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-19 09:51:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:46,924 INFO L124 PetriNetUnfolderBase]: 518/1052 cut-off events. [2024-11-19 09:51:46,925 INFO L125 PetriNetUnfolderBase]: For 652/668 co-relation queries the response was YES. [2024-11-19 09:51:46,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1052 events. 518/1052 cut-off events. For 652/668 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6051 event pairs, 140 based on Foata normal form. 32/980 useless extension candidates. Maximal degree in co-relation 1783. Up to 565 conditions per place. [2024-11-19 09:51:46,931 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-11-19 09:51:46,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 59 transitions, 363 flow [2024-11-19 09:51:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-19 09:51:46,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-19 09:51:46,932 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 236 flow. Second operand 4 states and 118 transitions. [2024-11-19 09:51:46,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 59 transitions, 363 flow [2024-11-19 09:51:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 328 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:46,934 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 205 flow [2024-11-19 09:51:46,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-19 09:51:46,935 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-11-19 09:51:46,935 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 205 flow [2024-11-19 09:51:46,935 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) [2024-11-19 09:51:46,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:46,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:46,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:51:46,936 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:46,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -80658713, now seen corresponding path program 1 times [2024-11-19 09:51:46,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:46,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249512779] [2024-11-19 09:51:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:47,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249512779] [2024-11-19 09:51:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249512779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:47,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:47,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:47,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949037414] [2024-11-19 09:51:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:47,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:47,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:47,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:51:47,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 205 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) [2024-11-19 09:51:47,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:47,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:51:47,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:47,136 INFO L124 PetriNetUnfolderBase]: 561/1192 cut-off events. [2024-11-19 09:51:47,137 INFO L125 PetriNetUnfolderBase]: For 607/623 co-relation queries the response was YES. [2024-11-19 09:51:47,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 1192 events. 561/1192 cut-off events. For 607/623 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7326 event pairs, 261 based on Foata normal form. 6/1076 useless extension candidates. Maximal degree in co-relation 2078. Up to 614 conditions per place. [2024-11-19 09:51:47,143 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 50 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2024-11-19 09:51:47,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 377 flow [2024-11-19 09:51:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-19 09:51:47,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-19 09:51:47,144 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 205 flow. Second operand 3 states and 100 transitions. [2024-11-19 09:51:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 377 flow [2024-11-19 09:51:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 363 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:47,146 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 201 flow [2024-11-19 09:51:47,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-19 09:51:47,147 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-11-19 09:51:47,147 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 201 flow [2024-11-19 09:51:47,147 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) [2024-11-19 09:51:47,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:47,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:47,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:51:47,148 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:47,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1032067254, now seen corresponding path program 1 times [2024-11-19 09:51:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146836767] [2024-11-19 09:51:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:47,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:47,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146836767] [2024-11-19 09:51:47,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146836767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:47,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:47,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40558451] [2024-11-19 09:51:47,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:47,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:47,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:47,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:51:47,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 201 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) [2024-11-19 09:51:47,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:47,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:51:47,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:47,339 INFO L124 PetriNetUnfolderBase]: 474/993 cut-off events. [2024-11-19 09:51:47,340 INFO L125 PetriNetUnfolderBase]: For 443/463 co-relation queries the response was YES. [2024-11-19 09:51:47,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 993 events. 474/993 cut-off events. For 443/463 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5604 event pairs, 197 based on Foata normal form. 23/938 useless extension candidates. Maximal degree in co-relation 2362. Up to 628 conditions per place. [2024-11-19 09:51:47,345 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 46 selfloop transitions, 2 changer transitions 6/63 dead transitions. [2024-11-19 09:51:47,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 364 flow [2024-11-19 09:51:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-19 09:51:47,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-11-19 09:51:47,346 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 201 flow. Second operand 3 states and 99 transitions. [2024-11-19 09:51:47,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 364 flow [2024-11-19 09:51:47,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:47,348 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 213 flow [2024-11-19 09:51:47,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2024-11-19 09:51:47,350 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-11-19 09:51:47,350 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 213 flow [2024-11-19 09:51:47,350 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) [2024-11-19 09:51:47,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:47,350 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:47,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:51:47,351 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:51:47,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1677011227, now seen corresponding path program 1 times [2024-11-19 09:51:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:47,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924951090] [2024-11-19 09:51:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:48,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:48,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924951090] [2024-11-19 09:51:48,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924951090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:48,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998143967] [2024-11-19 09:51:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:48,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:48,005 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) [2024-11-19 09:51:48,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:51:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:48,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:51:48,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:48,158 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 [2024-11-19 09:51:48,432 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-19 09:51:48,432 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 [2024-11-19 09:51:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:48,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:00,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:00,941 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 [2024-11-19 09:52:01,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:01,002 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 [2024-11-19 09:52:01,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:01,067 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 231 treesize of output 247 [2024-11-19 09:52:01,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:01,959 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 [2024-11-19 09:52:01,991 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 32 treesize of output 30 [2024-11-19 09:52:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998143967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:02,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2024-11-19 09:52:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885838556] [2024-11-19 09:52:02,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:02,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 09:52:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 09:52:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=562, Unknown=3, NotChecked=0, Total=702 [2024-11-19 09:52:06,083 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] [2024-11-19 09:52:10,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:14,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:18,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:22,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:26,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:30,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:34,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:38,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:42,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:46,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:50,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:54,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:52:54,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2024-11-19 09:52:54,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 213 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) [2024-11-19 09:52:54,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:54,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2024-11-19 09:52:54,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:56,679 INFO L124 PetriNetUnfolderBase]: 2550/4390 cut-off events. [2024-11-19 09:52:56,679 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2024-11-19 09:52:56,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11255 conditions, 4390 events. 2550/4390 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 25492 event pairs, 44 based on Foata normal form. 3/3879 useless extension candidates. Maximal degree in co-relation 8274. Up to 733 conditions per place. [2024-11-19 09:52:56,698 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 236 selfloop transitions, 44 changer transitions 99/382 dead transitions. [2024-11-19 09:52:56,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 382 transitions, 2172 flow [2024-11-19 09:52:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 09:52:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-19 09:52:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 553 transitions. [2024-11-19 09:52:56,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2675374939525883 [2024-11-19 09:52:56,701 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 213 flow. Second operand 39 states and 553 transitions. [2024-11-19 09:52:56,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 382 transitions, 2172 flow [2024-11-19 09:52:56,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 382 transitions, 2099 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:56,718 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 585 flow [2024-11-19 09:52:56,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=585, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2024-11-19 09:52:56,720 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-11-19 09:52:56,720 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 585 flow [2024-11-19 09:52:56,720 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) [2024-11-19 09:52:56,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:56,721 INFO L204 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] [2024-11-19 09:52:56,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:56,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:56,922 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:52:56,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2140899510, now seen corresponding path program 2 times [2024-11-19 09:52:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548665007] [2024-11-19 09:52:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:56,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:56,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:52:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548665007] [2024-11-19 09:52:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548665007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:52:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881916668] [2024-11-19 09:52:57,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:57,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:52:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:52:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:52:57,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:52:57,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 585 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:57,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:52:57,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:57,336 INFO L124 PetriNetUnfolderBase]: 1167/2515 cut-off events. [2024-11-19 09:52:57,336 INFO L125 PetriNetUnfolderBase]: For 5171/5199 co-relation queries the response was YES. [2024-11-19 09:52:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8281 conditions, 2515 events. 1167/2515 cut-off events. For 5171/5199 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15883 event pairs, 259 based on Foata normal form. 54/2532 useless extension candidates. Maximal degree in co-relation 8239. Up to 700 conditions per place. [2024-11-19 09:52:57,354 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 89 selfloop transitions, 19 changer transitions 8/131 dead transitions. [2024-11-19 09:52:57,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 131 transitions, 1016 flow [2024-11-19 09:52:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-19 09:52:57,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6509433962264151 [2024-11-19 09:52:57,356 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 585 flow. Second operand 4 states and 138 transitions. [2024-11-19 09:52:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 131 transitions, 1016 flow [2024-11-19 09:52:57,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 131 transitions, 953 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-11-19 09:52:57,370 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 593 flow [2024-11-19 09:52:57,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=593, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2024-11-19 09:52:57,371 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-11-19 09:52:57,371 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 593 flow [2024-11-19 09:52:57,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:57,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:57,371 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:57,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:52:57,372 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:52:57,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash -461150415, now seen corresponding path program 1 times [2024-11-19 09:52:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:57,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825062456] [2024-11-19 09:52:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 09:52:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825062456] [2024-11-19 09:52:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825062456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:52:57,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:52:57,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:52:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737071634] [2024-11-19 09:52:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:52:57,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:52:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:52:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:52:57,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-19 09:52:57,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 593 flow. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:57,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:57,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-19 09:52:57,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:57,978 INFO L124 PetriNetUnfolderBase]: 894/1845 cut-off events. [2024-11-19 09:52:57,979 INFO L125 PetriNetUnfolderBase]: For 3633/3665 co-relation queries the response was YES. [2024-11-19 09:52:57,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6074 conditions, 1845 events. 894/1845 cut-off events. For 3633/3665 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9650 event pairs, 279 based on Foata normal form. 14/1851 useless extension candidates. Maximal degree in co-relation 5581. Up to 1448 conditions per place. [2024-11-19 09:52:57,994 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 63 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-11-19 09:52:57,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 90 transitions, 695 flow [2024-11-19 09:52:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:52:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:52:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-19 09:52:57,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-19 09:52:57,995 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 593 flow. Second operand 6 states and 162 transitions. [2024-11-19 09:52:57,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 90 transitions, 695 flow [2024-11-19 09:52:58,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 645 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-11-19 09:52:58,005 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 523 flow [2024-11-19 09:52:58,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=523, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2024-11-19 09:52:58,006 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-11-19 09:52:58,006 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 523 flow [2024-11-19 09:52:58,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:58,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:58,006 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:58,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:52:58,007 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:52:58,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:58,007 INFO L85 PathProgramCache]: Analyzing trace with hash -20693813, now seen corresponding path program 3 times [2024-11-19 09:52:58,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290544178] [2024-11-19 09:52:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:58,047 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:52:58,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:52:58,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290544178] [2024-11-19 09:52:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290544178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832721418] [2024-11-19 09:52:58,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:58,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:58,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:58,195 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) [2024-11-19 09:52:58,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:52:58,474 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:52:58,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:58,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:52:58,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:58,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:52:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832721418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:58,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:58,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-19 09:52:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752587223] [2024-11-19 09:52:58,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:58,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:52:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:52:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:52:58,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-19 09:52:58,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 523 flow. Second operand has 18 states, 18 states have (on average 25.27777777777778) internal successors, (455), 18 states have internal predecessors, (455), 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) [2024-11-19 09:52:58,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:58,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-19 09:52:58,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:59,439 INFO L124 PetriNetUnfolderBase]: 756/1702 cut-off events. [2024-11-19 09:52:59,439 INFO L125 PetriNetUnfolderBase]: For 2737/2779 co-relation queries the response was YES. [2024-11-19 09:52:59,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 1702 events. 756/1702 cut-off events. For 2737/2779 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9545 event pairs, 233 based on Foata normal form. 38/1710 useless extension candidates. Maximal degree in co-relation 3906. Up to 1015 conditions per place. [2024-11-19 09:52:59,450 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 44 selfloop transitions, 12 changer transitions 46/114 dead transitions. [2024-11-19 09:52:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 114 transitions, 854 flow [2024-11-19 09:52:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:52:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:52:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-19 09:52:59,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303983228511531 [2024-11-19 09:52:59,451 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 523 flow. Second operand 9 states and 253 transitions. [2024-11-19 09:52:59,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 114 transitions, 854 flow [2024-11-19 09:52:59,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 834 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:52:59,460 INFO L231 Difference]: Finished difference. Result has 106 places, 65 transitions, 404 flow [2024-11-19 09:52:59,460 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=106, PETRI_TRANSITIONS=65} [2024-11-19 09:52:59,460 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-11-19 09:52:59,461 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 65 transitions, 404 flow [2024-11-19 09:52:59,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.27777777777778) internal successors, (455), 18 states have internal predecessors, (455), 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) [2024-11-19 09:52:59,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:59,461 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:52:59,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:52:59,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:52:59,662 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:52:59,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1561300187, now seen corresponding path program 4 times [2024-11-19 09:52:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:59,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294723697] [2024-11-19 09:52:59,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:59,705 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:59,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:53:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294723697] [2024-11-19 09:53:01,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294723697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506789535] [2024-11-19 09:53:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:53:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:01,034 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) [2024-11-19 09:53:01,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:53:01,139 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:53:01,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:01,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-19 09:53:01,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:01,262 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 [2024-11-19 09:53:01,298 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:53:01,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:53:01,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:53:01,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:53:02,540 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:53:02,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:53:02,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 24 [2024-11-19 09:53:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:53:02,588 INFO L311 TraceCheckSpWp]: Computing backward predicates...