./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-5.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/unroll-cond-5.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 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:56:07,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:56:07,210 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:56:07,233 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:56:07,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:56:07,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:56:07,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:56:07,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:56:07,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:56:07,274 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:56:07,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:56:07,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:56:07,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:56:07,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:56:07,276 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:56:07,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:56:07,279 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:56:07,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:56:07,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:56:07,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:56:07,280 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:56:07,282 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:56:07,282 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:56:07,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:56:07,283 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:56:07,283 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:56:07,283 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:56:07,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:56:07,284 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:56:07,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:56:07,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:56:07,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:56:07,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:56:07,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:56:07,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:56:07,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:56:07,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:56:07,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:56:07,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:56:07,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:56:07,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:56:07,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:56:07,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 [2024-11-19 09:56:07,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:56:07,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:56:07,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:56:07,591 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:56:07,591 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:56:07,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2024-11-19 09:56:09,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:56:09,249 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:56:09,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2024-11-19 09:56:09,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbd1784e/0f5ad4080e31483ab8c438c06f1f4205/FLAG553949d82 [2024-11-19 09:56:09,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbd1784e/0f5ad4080e31483ab8c438c06f1f4205 [2024-11-19 09:56:09,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:56:09,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:56:09,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:56:09,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:56:09,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:56:09,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:09,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152914e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09, skipping insertion in model container [2024-11-19 09:56:09,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:09,670 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:56:09,917 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 09:56:09,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:56:09,933 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:56:09,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:56:09,994 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:56:09,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09 WrapperNode [2024-11-19 09:56:09,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:56:09,999 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:56:09,999 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:56:09,999 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:56:10,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,050 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 199 [2024-11-19 09:56:10,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:56:10,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:56:10,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:56:10,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:56:10,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,083 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:56:10,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:56:10,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:56:10,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:56:10,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:56:10,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (1/1) ... [2024-11-19 09:56:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:56:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:10,143 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 09:56:10,145 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 09:56:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:56:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:56:10,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:56:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:56:10,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:56:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:56:10,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:56:10,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:56:10,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:56:10,186 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 09:56:10,287 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:56:10,290 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:56:10,715 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:56:10,715 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:56:11,036 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:56:11,036 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:56:11,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:56:11 BoogieIcfgContainer [2024-11-19 09:56:11,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:56:11,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:56:11,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:56:11,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:56:11,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:56:09" (1/3) ... [2024-11-19 09:56:11,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bbe7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:56:11, skipping insertion in model container [2024-11-19 09:56:11,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:09" (2/3) ... [2024-11-19 09:56:11,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bbe7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:56:11, skipping insertion in model container [2024-11-19 09:56:11,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:56:11" (3/3) ... [2024-11-19 09:56:11,047 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2024-11-19 09:56:11,066 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:56:11,066 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-19 09:56:11,066 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:56:11,134 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:56:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 64 transitions, 142 flow [2024-11-19 09:56:11,215 INFO L124 PetriNetUnfolderBase]: 7/62 cut-off events. [2024-11-19 09:56:11,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:56:11,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 62 events. 7/62 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 179 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2024-11-19 09:56:11,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 64 transitions, 142 flow [2024-11-19 09:56:11,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 61 transitions, 134 flow [2024-11-19 09:56:11,235 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:56:11,241 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;@1a43d993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:56:11,241 INFO L334 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2024-11-19 09:56:11,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:56:11,244 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:56:11,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:56:11,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:11,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:56:11,245 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:11,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 671334, now seen corresponding path program 1 times [2024-11-19 09:56:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:11,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125786817] [2024-11-19 09:56:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:11,517 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 09:56:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125786817] [2024-11-19 09:56:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125786817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:11,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:11,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:56:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380577299] [2024-11-19 09:56:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:11,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:11,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:11,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:11,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 09:56:11,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:11,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:11,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:11,778 INFO L124 PetriNetUnfolderBase]: 218/540 cut-off events. [2024-11-19 09:56:11,780 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-11-19 09:56:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 540 events. 218/540 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3143 event pairs, 141 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 804. Up to 347 conditions per place. [2024-11-19 09:56:11,788 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 30 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-19 09:56:11,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 192 flow [2024-11-19 09:56:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-11-19 09:56:11,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6302083333333334 [2024-11-19 09:56:11,803 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 134 flow. Second operand 3 states and 121 transitions. [2024-11-19 09:56:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 192 flow [2024-11-19 09:56:11,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:11,812 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 124 flow [2024-11-19 09:56:11,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-11-19 09:56:11,818 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-19 09:56:11,818 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 124 flow [2024-11-19 09:56:11,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 09:56:11,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:11,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:56:11,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:56:11,819 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:11,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 671335, now seen corresponding path program 1 times [2024-11-19 09:56:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028952821] [2024-11-19 09:56:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:12,184 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 09:56:12,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028952821] [2024-11-19 09:56:12,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028952821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:12,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:12,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474626893] [2024-11-19 09:56:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:12,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:56:12,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:56:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:56:12,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:12,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 09:56:12,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:12,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:12,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:12,459 INFO L124 PetriNetUnfolderBase]: 219/543 cut-off events. [2024-11-19 09:56:12,460 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:12,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 543 events. 219/543 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3160 event pairs, 141 based on Foata normal form. 0/425 useless extension candidates. Maximal degree in co-relation 885. Up to 352 conditions per place. [2024-11-19 09:56:12,469 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 33 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-11-19 09:56:12,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 204 flow [2024-11-19 09:56:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-19 09:56:12,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-19 09:56:12,473 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 124 flow. Second operand 3 states and 124 transitions. [2024-11-19 09:56:12,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 204 flow [2024-11-19 09:56:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:12,478 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 139 flow [2024-11-19 09:56:12,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-11-19 09:56:12,479 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-19 09:56:12,479 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 139 flow [2024-11-19 09:56:12,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 09:56:12,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:12,481 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:56:12,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:56:12,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:12,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash 645174634, now seen corresponding path program 1 times [2024-11-19 09:56:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:12,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531426098] [2024-11-19 09:56:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:12,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531426098] [2024-11-19 09:56:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531426098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779173010] [2024-11-19 09:56:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:12,794 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 09:56:12,795 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 09:56:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:12,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:56:12,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:12,961 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 09:56:13,207 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 09:56:13,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:13,314 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 09:56:13,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779173010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:13,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:13,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:13,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663442283] [2024-11-19 09:56:13,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:13,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:13,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 139 flow. Second operand has 11 states, 11 states have (on average 30.363636363636363) internal successors, (334), 11 states have internal predecessors, (334), 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 09:56:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:13,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:13,871 INFO L124 PetriNetUnfolderBase]: 220/545 cut-off events. [2024-11-19 09:56:13,871 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:13,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 545 events. 220/545 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3165 event pairs, 141 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 885. Up to 349 conditions per place. [2024-11-19 09:56:13,876 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 29 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2024-11-19 09:56:13,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 223 flow [2024-11-19 09:56:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 243 transitions. [2024-11-19 09:56:13,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5424107142857143 [2024-11-19 09:56:13,880 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 139 flow. Second operand 7 states and 243 transitions. [2024-11-19 09:56:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 223 flow [2024-11-19 09:56:13,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:13,884 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 164 flow [2024-11-19 09:56:13,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-11-19 09:56:13,885 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:56:13,885 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 164 flow [2024-11-19 09:56:13,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.363636363636363) internal successors, (334), 11 states have internal predecessors, (334), 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 09:56:13,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:13,886 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:56:13,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:56:14,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:14,088 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:14,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1472063753, now seen corresponding path program 1 times [2024-11-19 09:56:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669637888] [2024-11-19 09:56:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669637888] [2024-11-19 09:56:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669637888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31349423] [2024-11-19 09:56:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:56:14,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:56:14,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:56:14,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-19 09:56:14,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:14,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-19 09:56:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:14,332 INFO L124 PetriNetUnfolderBase]: 220/468 cut-off events. [2024-11-19 09:56:14,333 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 468 events. 220/468 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2254 event pairs, 141 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 808. Up to 348 conditions per place. [2024-11-19 09:56:14,335 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 34 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-11-19 09:56:14,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 220 flow [2024-11-19 09:56:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-19 09:56:14,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2024-11-19 09:56:14,337 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 164 flow. Second operand 4 states and 118 transitions. [2024-11-19 09:56:14,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 220 flow [2024-11-19 09:56:14,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 202 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:14,339 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 134 flow [2024-11-19 09:56:14,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-11-19 09:56:14,340 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2024-11-19 09:56:14,340 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 134 flow [2024-11-19 09:56:14,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:14,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:14,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:56:14,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:56:14,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:14,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1472063752, now seen corresponding path program 1 times [2024-11-19 09:56:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959865829] [2024-11-19 09:56:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,383 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 09:56:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959865829] [2024-11-19 09:56:14,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959865829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022652801] [2024-11-19 09:56:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:14,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 64 [2024-11-19 09:56:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 09:56:14,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 64 [2024-11-19 09:56:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:14,471 INFO L124 PetriNetUnfolderBase]: 219/467 cut-off events. [2024-11-19 09:56:14,471 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 467 events. 219/467 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2231 event pairs, 141 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 808. Up to 353 conditions per place. [2024-11-19 09:56:14,474 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 35 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-19 09:56:14,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 203 flow [2024-11-19 09:56:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-19 09:56:14,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6510416666666666 [2024-11-19 09:56:14,476 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 134 flow. Second operand 3 states and 125 transitions. [2024-11-19 09:56:14,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 203 flow [2024-11-19 09:56:14,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:14,478 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 129 flow [2024-11-19 09:56:14,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-11-19 09:56:14,479 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2024-11-19 09:56:14,479 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 129 flow [2024-11-19 09:56:14,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 09:56:14,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:14,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:14,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:56:14,480 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:14,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash 421903637, now seen corresponding path program 1 times [2024-11-19 09:56:14,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222962055] [2024-11-19 09:56:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,621 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 09:56:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222962055] [2024-11-19 09:56:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222962055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912495241] [2024-11-19 09:56:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:14,625 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 09:56:14,627 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 09:56:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:56:14,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:14,770 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 09:56:14,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:14,832 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 29 treesize of output 25 [2024-11-19 09:56:14,859 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 09:56:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912495241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:14,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:14,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140130412] [2024-11-19 09:56:14,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:15,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:15,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 129 flow. Second operand has 11 states, 11 states have (on average 31.181818181818183) internal successors, (343), 11 states have internal predecessors, (343), 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 09:56:15,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:15,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:15,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:15,464 INFO L124 PetriNetUnfolderBase]: 511/921 cut-off events. [2024-11-19 09:56:15,465 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:56:15,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 921 events. 511/921 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4708 event pairs, 169 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 1712. Up to 457 conditions per place. [2024-11-19 09:56:15,471 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 60 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-11-19 09:56:15,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 312 flow [2024-11-19 09:56:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-11-19 09:56:15,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-11-19 09:56:15,473 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 129 flow. Second operand 4 states and 176 transitions. [2024-11-19 09:56:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 312 flow [2024-11-19 09:56:15,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:15,476 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 142 flow [2024-11-19 09:56:15,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-11-19 09:56:15,477 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-19 09:56:15,478 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 142 flow [2024-11-19 09:56:15,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.181818181818183) internal successors, (343), 11 states have internal predecessors, (343), 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 09:56:15,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:15,479 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:15,497 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 09:56:15,679 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,SelfDestructingSolverStorable5 [2024-11-19 09:56:15,680 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:15,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1722492185, now seen corresponding path program 1 times [2024-11-19 09:56:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:15,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476127232] [2024-11-19 09:56:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476127232] [2024-11-19 09:56:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476127232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888718855] [2024-11-19 09:56:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:15,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:15,841 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 09:56:15,842 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 09:56:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:15,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:15,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:16,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:16,095 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 36 treesize of output 32 [2024-11-19 09:56:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888718855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:16,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:56:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410047985] [2024-11-19 09:56:16,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:16,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:56:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:56:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:56:17,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:17,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 142 flow. Second operand has 17 states, 17 states have (on average 30.764705882352942) internal successors, (523), 17 states have internal predecessors, (523), 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 09:56:17,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:17,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:17,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:17,701 INFO L124 PetriNetUnfolderBase]: 1073/2096 cut-off events. [2024-11-19 09:56:17,701 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-11-19 09:56:17,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 2096 events. 1073/2096 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13395 event pairs, 434 based on Foata normal form. 0/1858 useless extension candidates. Maximal degree in co-relation 2260. Up to 705 conditions per place. [2024-11-19 09:56:17,713 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 101 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2024-11-19 09:56:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 130 transitions, 546 flow [2024-11-19 09:56:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:56:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:56:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 347 transitions. [2024-11-19 09:56:17,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.677734375 [2024-11-19 09:56:17,716 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 142 flow. Second operand 8 states and 347 transitions. [2024-11-19 09:56:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 130 transitions, 546 flow [2024-11-19 09:56:17,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 130 transitions, 539 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:17,719 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 228 flow [2024-11-19 09:56:17,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-11-19 09:56:17,720 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:56:17,720 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 228 flow [2024-11-19 09:56:17,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 30.764705882352942) internal successors, (523), 17 states have internal predecessors, (523), 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 09:56:17,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:17,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:17,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:17,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:17,926 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:17,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1678641019, now seen corresponding path program 1 times [2024-11-19 09:56:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:17,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154028056] [2024-11-19 09:56:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:18,049 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 09:56:18,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:18,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154028056] [2024-11-19 09:56:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154028056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317825581] [2024-11-19 09:56:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:18,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:18,052 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 09:56:18,054 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 09:56:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:18,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:56:18,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:18,201 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 09:56:18,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:18,268 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 29 treesize of output 25 [2024-11-19 09:56:18,288 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 09:56:18,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317825581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:18,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:18,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775300446] [2024-11-19 09:56:18,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:18,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:18,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:18,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 228 flow. Second operand has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:18,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:18,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:18,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:18,875 INFO L124 PetriNetUnfolderBase]: 1851/3107 cut-off events. [2024-11-19 09:56:18,875 INFO L125 PetriNetUnfolderBase]: For 1771/1871 co-relation queries the response was YES. [2024-11-19 09:56:18,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7465 conditions, 3107 events. 1851/3107 cut-off events. For 1771/1871 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17273 event pairs, 372 based on Foata normal form. 160/3046 useless extension candidates. Maximal degree in co-relation 4661. Up to 2119 conditions per place. [2024-11-19 09:56:18,895 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 66 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-19 09:56:18,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 464 flow [2024-11-19 09:56:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-19 09:56:18,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5859375 [2024-11-19 09:56:18,897 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 228 flow. Second operand 4 states and 150 transitions. [2024-11-19 09:56:18,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 464 flow [2024-11-19 09:56:18,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:18,904 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 299 flow [2024-11-19 09:56:18,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=299, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-11-19 09:56:18,905 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2024-11-19 09:56:18,905 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 299 flow [2024-11-19 09:56:18,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:18,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:18,906 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:18,923 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 09:56:19,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:19,111 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:19,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 498264771, now seen corresponding path program 1 times [2024-11-19 09:56:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:19,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308200173] [2024-11-19 09:56:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:19,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:19,284 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 09:56:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:19,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308200173] [2024-11-19 09:56:19,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308200173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:19,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67100652] [2024-11-19 09:56:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:19,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:19,287 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 09:56:19,288 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 09:56:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:19,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:19,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:19,478 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 09:56:19,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:19,507 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 29 treesize of output 25 [2024-11-19 09:56:19,674 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 09:56:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67100652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:19,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:19,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-19 09:56:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106481459] [2024-11-19 09:56:19,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:19,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:56:19,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:19,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:56:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:19,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:19,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 299 flow. Second operand has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 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 09:56:19,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:19,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:19,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:20,487 INFO L124 PetriNetUnfolderBase]: 1943/3246 cut-off events. [2024-11-19 09:56:20,487 INFO L125 PetriNetUnfolderBase]: For 2209/2339 co-relation queries the response was YES. [2024-11-19 09:56:20,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8440 conditions, 3246 events. 1943/3246 cut-off events. For 2209/2339 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17888 event pairs, 828 based on Foata normal form. 0/3031 useless extension candidates. Maximal degree in co-relation 5169. Up to 2490 conditions per place. [2024-11-19 09:56:20,510 INFO L140 encePairwiseOnDemand]: 49/64 looper letters, 91 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-19 09:56:20,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 661 flow [2024-11-19 09:56:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 248 transitions. [2024-11-19 09:56:20,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-11-19 09:56:20,513 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 299 flow. Second operand 7 states and 248 transitions. [2024-11-19 09:56:20,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 661 flow [2024-11-19 09:56:20,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 632 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:20,520 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 360 flow [2024-11-19 09:56:20,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=360, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-11-19 09:56:20,521 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2024-11-19 09:56:20,521 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 360 flow [2024-11-19 09:56:20,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 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 09:56:20,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:20,521 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:20,541 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 09:56:20,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:20,727 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:20,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -756779850, now seen corresponding path program 2 times [2024-11-19 09:56:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655364508] [2024-11-19 09:56:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:20,745 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:20,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:20,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655364508] [2024-11-19 09:56:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655364508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432151308] [2024-11-19 09:56:20,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:20,919 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 09:56:20,921 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 09:56:20,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:20,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:20,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 09:56:20,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:21,006 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 09:56:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:21,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432151308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:21,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:21,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167870977] [2024-11-19 09:56:21,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:21,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:21,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-19 09:56:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 360 flow. Second operand has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 11 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-19 09:56:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:22,073 INFO L124 PetriNetUnfolderBase]: 1497/2717 cut-off events. [2024-11-19 09:56:22,073 INFO L125 PetriNetUnfolderBase]: For 1548/1548 co-relation queries the response was YES. [2024-11-19 09:56:22,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6924 conditions, 2717 events. 1497/2717 cut-off events. For 1548/1548 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16681 event pairs, 764 based on Foata normal form. 0/2641 useless extension candidates. Maximal degree in co-relation 4378. Up to 1722 conditions per place. [2024-11-19 09:56:22,094 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 82 selfloop transitions, 10 changer transitions 0/106 dead transitions. [2024-11-19 09:56:22,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 721 flow [2024-11-19 09:56:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 198 transitions. [2024-11-19 09:56:22,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-11-19 09:56:22,097 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 360 flow. Second operand 5 states and 198 transitions. [2024-11-19 09:56:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 721 flow [2024-11-19 09:56:22,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 106 transitions, 680 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:56:22,104 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 347 flow [2024-11-19 09:56:22,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2024-11-19 09:56:22,107 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2024-11-19 09:56:22,107 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 347 flow [2024-11-19 09:56:22,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 11 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:22,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:22,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:22,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:22,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:22,308 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:22,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash 950243014, now seen corresponding path program 2 times [2024-11-19 09:56:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443766078] [2024-11-19 09:56:22,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:22,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:22,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:56:22,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443766078] [2024-11-19 09:56:22,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443766078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:22,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:56:22,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480915848] [2024-11-19 09:56:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:22,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:22,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:22,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:22,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 09:56:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:22,998 INFO L124 PetriNetUnfolderBase]: 1758/2930 cut-off events. [2024-11-19 09:56:22,998 INFO L125 PetriNetUnfolderBase]: For 3657/3657 co-relation queries the response was YES. [2024-11-19 09:56:23,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8066 conditions, 2930 events. 1758/2930 cut-off events. For 3657/3657 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15779 event pairs, 1052 based on Foata normal form. 96/2773 useless extension candidates. Maximal degree in co-relation 4901. Up to 2216 conditions per place. [2024-11-19 09:56:23,027 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 64 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-11-19 09:56:23,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 534 flow [2024-11-19 09:56:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-11-19 09:56:23,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-19 09:56:23,029 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 347 flow. Second operand 5 states and 152 transitions. [2024-11-19 09:56:23,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 534 flow [2024-11-19 09:56:23,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 502 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:23,036 INFO L231 Difference]: Finished difference. Result has 61 places, 67 transitions, 327 flow [2024-11-19 09:56:23,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=61, PETRI_TRANSITIONS=67} [2024-11-19 09:56:23,038 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-19 09:56:23,038 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 67 transitions, 327 flow [2024-11-19 09:56:23,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 09:56:23,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:23,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:23,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:56:23,039 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:23,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2090082605, now seen corresponding path program 1 times [2024-11-19 09:56:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:23,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769905236] [2024-11-19 09:56:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:23,197 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 09:56:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769905236] [2024-11-19 09:56:23,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769905236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:23,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972034634] [2024-11-19 09:56:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:23,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:23,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:23,200 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 09:56:23,201 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 09:56:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:23,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:23,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:23,397 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 09:56:23,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:23,454 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 36 treesize of output 32 [2024-11-19 09:56:23,634 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 09:56:23,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972034634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:23,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:23,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:56:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463744309] [2024-11-19 09:56:23,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:23,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:56:23,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:56:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:56:24,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:24,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 67 transitions, 327 flow. Second operand has 17 states, 17 states have (on average 23.294117647058822) internal successors, (396), 17 states have internal predecessors, (396), 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 09:56:24,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:24,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:24,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:24,793 INFO L124 PetriNetUnfolderBase]: 1644/2736 cut-off events. [2024-11-19 09:56:24,794 INFO L125 PetriNetUnfolderBase]: For 2138/2138 co-relation queries the response was YES. [2024-11-19 09:56:24,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 2736 events. 1644/2736 cut-off events. For 2138/2138 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14437 event pairs, 789 based on Foata normal form. 16/2601 useless extension candidates. Maximal degree in co-relation 4626. Up to 1275 conditions per place. [2024-11-19 09:56:24,807 INFO L140 encePairwiseOnDemand]: 43/64 looper letters, 97 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-11-19 09:56:24,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 129 transitions, 752 flow [2024-11-19 09:56:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:56:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:56:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-19 09:56:24,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.548828125 [2024-11-19 09:56:24,809 INFO L175 Difference]: Start difference. First operand has 61 places, 67 transitions, 327 flow. Second operand 8 states and 281 transitions. [2024-11-19 09:56:24,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 129 transitions, 752 flow [2024-11-19 09:56:24,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 129 transitions, 730 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:24,817 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 461 flow [2024-11-19 09:56:24,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=461, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2024-11-19 09:56:24,818 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2024-11-19 09:56:24,819 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 461 flow [2024-11-19 09:56:24,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 23.294117647058822) internal successors, (396), 17 states have internal predecessors, (396), 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 09:56:24,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:24,819 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:24,837 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 09:56:25,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:25,024 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:25,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1645490064, now seen corresponding path program 2 times [2024-11-19 09:56:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:25,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796570504] [2024-11-19 09:56:25,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:25,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:25,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:56:25,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:25,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796570504] [2024-11-19 09:56:25,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796570504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:25,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:25,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:56:25,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091237323] [2024-11-19 09:56:25,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:25,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:25,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:25,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-19 09:56:25,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:25,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:25,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-19 09:56:25,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:25,641 INFO L124 PetriNetUnfolderBase]: 1489/2501 cut-off events. [2024-11-19 09:56:25,641 INFO L125 PetriNetUnfolderBase]: For 2741/2741 co-relation queries the response was YES. [2024-11-19 09:56:25,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7207 conditions, 2501 events. 1489/2501 cut-off events. For 2741/2741 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13280 event pairs, 442 based on Foata normal form. 16/2488 useless extension candidates. Maximal degree in co-relation 4507. Up to 1264 conditions per place. [2024-11-19 09:56:25,656 INFO L140 encePairwiseOnDemand]: 47/64 looper letters, 42 selfloop transitions, 36 changer transitions 0/83 dead transitions. [2024-11-19 09:56:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 647 flow [2024-11-19 09:56:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-19 09:56:25,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-11-19 09:56:25,657 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 461 flow. Second operand 5 states and 148 transitions. [2024-11-19 09:56:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 647 flow [2024-11-19 09:56:25,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 628 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:56:25,668 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 485 flow [2024-11-19 09:56:25,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2024-11-19 09:56:25,670 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-11-19 09:56:25,670 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 485 flow [2024-11-19 09:56:25,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:25,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:25,671 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] [2024-11-19 09:56:25,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:56:25,671 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:25,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1765371169, now seen corresponding path program 1 times [2024-11-19 09:56:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408889548] [2024-11-19 09:56:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:25,717 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 09:56:25,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:25,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408889548] [2024-11-19 09:56:25,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408889548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:25,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:25,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626193289] [2024-11-19 09:56:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:25,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:25,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:25,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 64 [2024-11-19 09:56:25,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 485 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:25,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:25,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 64 [2024-11-19 09:56:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:25,981 INFO L124 PetriNetUnfolderBase]: 1483/2467 cut-off events. [2024-11-19 09:56:25,982 INFO L125 PetriNetUnfolderBase]: For 3295/3295 co-relation queries the response was YES. [2024-11-19 09:56:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7716 conditions, 2467 events. 1483/2467 cut-off events. For 3295/3295 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12945 event pairs, 364 based on Foata normal form. 2/2437 useless extension candidates. Maximal degree in co-relation 4907. Up to 1887 conditions per place. [2024-11-19 09:56:25,995 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 75 selfloop transitions, 13 changer transitions 1/94 dead transitions. [2024-11-19 09:56:25,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 772 flow [2024-11-19 09:56:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-19 09:56:25,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7552083333333334 [2024-11-19 09:56:25,997 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 485 flow. Second operand 3 states and 145 transitions. [2024-11-19 09:56:25,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 772 flow [2024-11-19 09:56:26,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 682 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:26,008 INFO L231 Difference]: Finished difference. Result has 59 places, 78 transitions, 510 flow [2024-11-19 09:56:26,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=59, PETRI_TRANSITIONS=78} [2024-11-19 09:56:26,009 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2024-11-19 09:56:26,009 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 78 transitions, 510 flow [2024-11-19 09:56:26,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:56:26,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:26,010 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] [2024-11-19 09:56:26,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:56:26,010 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:26,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1893744589, now seen corresponding path program 1 times [2024-11-19 09:56:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051275840] [2024-11-19 09:56:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:26,143 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 09:56:26,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051275840] [2024-11-19 09:56:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051275840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:26,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115300492] [2024-11-19 09:56:26,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:26,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:26,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 64 [2024-11-19 09:56:26,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 78 transitions, 510 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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 09:56:26,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:26,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 64 [2024-11-19 09:56:26,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:27,011 INFO L124 PetriNetUnfolderBase]: 1649/2693 cut-off events. [2024-11-19 09:56:27,012 INFO L125 PetriNetUnfolderBase]: For 3551/3551 co-relation queries the response was YES. [2024-11-19 09:56:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2693 events. 1649/2693 cut-off events. For 3551/3551 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14573 event pairs, 578 based on Foata normal form. 18/2709 useless extension candidates. Maximal degree in co-relation 5292. Up to 1498 conditions per place. [2024-11-19 09:56:27,026 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 163 selfloop transitions, 9 changer transitions 0/174 dead transitions. [2024-11-19 09:56:27,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 174 transitions, 1447 flow [2024-11-19 09:56:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-11-19 09:56:27,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.709375 [2024-11-19 09:56:27,029 INFO L175 Difference]: Start difference. First operand has 59 places, 78 transitions, 510 flow. Second operand 5 states and 227 transitions. [2024-11-19 09:56:27,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 174 transitions, 1447 flow [2024-11-19 09:56:27,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 174 transitions, 1388 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:27,038 INFO L231 Difference]: Finished difference. Result has 65 places, 82 transitions, 560 flow [2024-11-19 09:56:27,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=65, PETRI_TRANSITIONS=82} [2024-11-19 09:56:27,039 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2024-11-19 09:56:27,039 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 82 transitions, 560 flow [2024-11-19 09:56:27,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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 09:56:27,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:27,040 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] [2024-11-19 09:56:27,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:56:27,040 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:27,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 559554922, now seen corresponding path program 1 times [2024-11-19 09:56:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866213709] [2024-11-19 09:56:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:27,218 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 09:56:27,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866213709] [2024-11-19 09:56:27,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866213709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:27,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:27,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:27,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809468340] [2024-11-19 09:56:27,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:27,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:27,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:27,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 82 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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 09:56:27,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:27,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:27,483 INFO L124 PetriNetUnfolderBase]: 1251/2047 cut-off events. [2024-11-19 09:56:27,483 INFO L125 PetriNetUnfolderBase]: For 3458/3458 co-relation queries the response was YES. [2024-11-19 09:56:27,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6755 conditions, 2047 events. 1251/2047 cut-off events. For 3458/3458 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9752 event pairs, 708 based on Foata normal form. 32/2079 useless extension candidates. Maximal degree in co-relation 4078. Up to 1718 conditions per place. [2024-11-19 09:56:27,491 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 82 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-11-19 09:56:27,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 778 flow [2024-11-19 09:56:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-19 09:56:27,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6171875 [2024-11-19 09:56:27,492 INFO L175 Difference]: Start difference. First operand has 65 places, 82 transitions, 560 flow. Second operand 4 states and 158 transitions. [2024-11-19 09:56:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 778 flow [2024-11-19 09:56:27,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 743 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:27,500 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 454 flow [2024-11-19 09:56:27,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=454, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-11-19 09:56:27,500 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2024-11-19 09:56:27,501 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 454 flow [2024-11-19 09:56:27,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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 09:56:27,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:27,502 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] [2024-11-19 09:56:27,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:56:27,502 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:27,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash 212226949, now seen corresponding path program 1 times [2024-11-19 09:56:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636095254] [2024-11-19 09:56:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:27,687 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 09:56:27,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636095254] [2024-11-19 09:56:27,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636095254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:27,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:27,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:56:27,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173042646] [2024-11-19 09:56:27,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:27,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:27,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:27,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 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 09:56:27,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:27,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:27,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:28,131 INFO L124 PetriNetUnfolderBase]: 1483/2447 cut-off events. [2024-11-19 09:56:28,131 INFO L125 PetriNetUnfolderBase]: For 4287/4287 co-relation queries the response was YES. [2024-11-19 09:56:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 2447 events. 1483/2447 cut-off events. For 4287/4287 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12940 event pairs, 436 based on Foata normal form. 40/2487 useless extension candidates. Maximal degree in co-relation 5076. Up to 1198 conditions per place. [2024-11-19 09:56:28,143 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 135 selfloop transitions, 20 changer transitions 0/156 dead transitions. [2024-11-19 09:56:28,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 156 transitions, 1254 flow [2024-11-19 09:56:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:56:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:56:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 254 transitions. [2024-11-19 09:56:28,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6614583333333334 [2024-11-19 09:56:28,145 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 454 flow. Second operand 6 states and 254 transitions. [2024-11-19 09:56:28,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 156 transitions, 1254 flow [2024-11-19 09:56:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 156 transitions, 1211 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:28,156 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 645 flow [2024-11-19 09:56:28,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=645, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-11-19 09:56:28,157 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2024-11-19 09:56:28,157 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 645 flow [2024-11-19 09:56:28,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 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 09:56:28,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:28,158 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] [2024-11-19 09:56:28,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:56:28,158 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:28,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash -963454909, now seen corresponding path program 2 times [2024-11-19 09:56:28,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:28,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982042448] [2024-11-19 09:56:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:28,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:28,179 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:28,179 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:28,259 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 09:56:28,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:28,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982042448] [2024-11-19 09:56:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982042448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:28,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:28,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672143096] [2024-11-19 09:56:28,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:28,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:28,275 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:28,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 645 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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 09:56:28,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:28,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:28,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:28,607 INFO L124 PetriNetUnfolderBase]: 1515/2511 cut-off events. [2024-11-19 09:56:28,607 INFO L125 PetriNetUnfolderBase]: For 6402/6402 co-relation queries the response was YES. [2024-11-19 09:56:28,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9234 conditions, 2511 events. 1515/2511 cut-off events. For 6402/6402 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12709 event pairs, 734 based on Foata normal form. 46/2557 useless extension candidates. Maximal degree in co-relation 6512. Up to 1818 conditions per place. [2024-11-19 09:56:28,622 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 99 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-11-19 09:56:28,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 1163 flow [2024-11-19 09:56:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-19 09:56:28,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-11-19 09:56:28,624 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 645 flow. Second operand 5 states and 191 transitions. [2024-11-19 09:56:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 1163 flow [2024-11-19 09:56:28,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 1131 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:28,638 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 710 flow [2024-11-19 09:56:28,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-11-19 09:56:28,638 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 19 predicate places. [2024-11-19 09:56:28,639 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 710 flow [2024-11-19 09:56:28,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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 09:56:28,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:28,639 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 09:56:28,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:56:28,639 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:28,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash -81397601, now seen corresponding path program 1 times [2024-11-19 09:56:28,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:28,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667987726] [2024-11-19 09:56:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:28,792 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 09:56:28,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667987726] [2024-11-19 09:56:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667987726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:28,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:56:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419983920] [2024-11-19 09:56:28,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:28,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:28,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:28,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 710 flow. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 6 states have internal predecessors, (178), 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 09:56:28,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:28,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:28,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:29,298 INFO L124 PetriNetUnfolderBase]: 1991/3303 cut-off events. [2024-11-19 09:56:29,298 INFO L125 PetriNetUnfolderBase]: For 9372/9372 co-relation queries the response was YES. [2024-11-19 09:56:29,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12260 conditions, 3303 events. 1991/3303 cut-off events. For 9372/9372 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17200 event pairs, 720 based on Foata normal form. 40/3343 useless extension candidates. Maximal degree in co-relation 10675. Up to 1700 conditions per place. [2024-11-19 09:56:29,312 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 134 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-11-19 09:56:29,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1516 flow [2024-11-19 09:56:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 271 transitions. [2024-11-19 09:56:29,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6049107142857143 [2024-11-19 09:56:29,315 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 710 flow. Second operand 7 states and 271 transitions. [2024-11-19 09:56:29,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1516 flow [2024-11-19 09:56:29,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 161 transitions, 1478 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:29,338 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 868 flow [2024-11-19 09:56:29,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-11-19 09:56:29,339 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 26 predicate places. [2024-11-19 09:56:29,339 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 868 flow [2024-11-19 09:56:29,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 6 states have internal predecessors, (178), 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 09:56:29,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:29,340 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 09:56:29,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:56:29,340 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:29,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1747129421, now seen corresponding path program 2 times [2024-11-19 09:56:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:29,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473582925] [2024-11-19 09:56:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:29,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:29,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:29,467 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 09:56:29,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:29,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473582925] [2024-11-19 09:56:29,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473582925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:29,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:29,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:29,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126312389] [2024-11-19 09:56:29,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:29,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:29,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:29,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 868 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 09:56:29,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:29,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:30,087 INFO L124 PetriNetUnfolderBase]: 1949/3201 cut-off events. [2024-11-19 09:56:30,087 INFO L125 PetriNetUnfolderBase]: For 11992/11992 co-relation queries the response was YES. [2024-11-19 09:56:30,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12723 conditions, 3201 events. 1949/3201 cut-off events. For 11992/11992 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16861 event pairs, 724 based on Foata normal form. 6/3207 useless extension candidates. Maximal degree in co-relation 11451. Up to 1612 conditions per place. [2024-11-19 09:56:30,101 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 120 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-11-19 09:56:30,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1524 flow [2024-11-19 09:56:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-11-19 09:56:30,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.659375 [2024-11-19 09:56:30,103 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 868 flow. Second operand 5 states and 211 transitions. [2024-11-19 09:56:30,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1524 flow [2024-11-19 09:56:30,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1474 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:30,135 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 960 flow [2024-11-19 09:56:30,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=960, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-11-19 09:56:30,136 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 29 predicate places. [2024-11-19 09:56:30,136 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 960 flow [2024-11-19 09:56:30,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 09:56:30,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:30,137 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 09:56:30,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:56:30,137 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:30,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash 903019651, now seen corresponding path program 3 times [2024-11-19 09:56:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:30,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580914296] [2024-11-19 09:56:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:56:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:30,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:56:30,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:30,276 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 09:56:30,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:30,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580914296] [2024-11-19 09:56:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580914296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:30,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173114389] [2024-11-19 09:56:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:30,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:30,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:30,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 960 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 09:56:30,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:30,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:30,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:30,706 INFO L124 PetriNetUnfolderBase]: 1943/3195 cut-off events. [2024-11-19 09:56:30,706 INFO L125 PetriNetUnfolderBase]: For 15008/15008 co-relation queries the response was YES. [2024-11-19 09:56:30,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13129 conditions, 3195 events. 1943/3195 cut-off events. For 15008/15008 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16339 event pairs, 1094 based on Foata normal form. 6/3201 useless extension candidates. Maximal degree in co-relation 11940. Up to 2742 conditions per place. [2024-11-19 09:56:30,717 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 90 selfloop transitions, 35 changer transitions 0/126 dead transitions. [2024-11-19 09:56:30,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1483 flow [2024-11-19 09:56:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2024-11-19 09:56:30,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-11-19 09:56:30,719 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 960 flow. Second operand 5 states and 193 transitions. [2024-11-19 09:56:30,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1483 flow [2024-11-19 09:56:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1427 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:30,747 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 1222 flow [2024-11-19 09:56:30,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1222, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-11-19 09:56:30,748 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2024-11-19 09:56:30,748 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 1222 flow [2024-11-19 09:56:30,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 09:56:30,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:30,748 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 09:56:30,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 09:56:30,749 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:30,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1203177567, now seen corresponding path program 4 times [2024-11-19 09:56:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94276295] [2024-11-19 09:56:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:56:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:30,768 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:56:30,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:30,980 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 09:56:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94276295] [2024-11-19 09:56:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94276295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:30,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:30,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:56:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980938015] [2024-11-19 09:56:30,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:30,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:56:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:56:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:56:34,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:35,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:35,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 1222 flow. Second operand has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 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 09:56:35,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:35,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:35,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:35,517 INFO L124 PetriNetUnfolderBase]: 1987/3347 cut-off events. [2024-11-19 09:56:35,517 INFO L125 PetriNetUnfolderBase]: For 16422/16422 co-relation queries the response was YES. [2024-11-19 09:56:35,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 3347 events. 1987/3347 cut-off events. For 16422/16422 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17820 event pairs, 820 based on Foata normal form. 48/3395 useless extension candidates. Maximal degree in co-relation 12668. Up to 1944 conditions per place. [2024-11-19 09:56:35,534 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 149 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-11-19 09:56:35,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 186 transitions, 2200 flow [2024-11-19 09:56:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2024-11-19 09:56:35,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-19 09:56:35,536 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 1222 flow. Second operand 7 states and 264 transitions. [2024-11-19 09:56:35,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 186 transitions, 2200 flow [2024-11-19 09:56:35,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 186 transitions, 2130 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:35,574 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 1310 flow [2024-11-19 09:56:35,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1310, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-11-19 09:56:35,574 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2024-11-19 09:56:35,575 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 1310 flow [2024-11-19 09:56:35,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 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 09:56:35,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:35,575 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] [2024-11-19 09:56:35,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:56:35,575 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:35,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1297033285, now seen corresponding path program 1 times [2024-11-19 09:56:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716000301] [2024-11-19 09:56:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:35,698 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 09:56:35,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716000301] [2024-11-19 09:56:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716000301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:35,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:35,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49226585] [2024-11-19 09:56:35,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:35,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:35,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:35,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 1310 flow. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 09:56:35,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:35,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:35,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:36,093 INFO L124 PetriNetUnfolderBase]: 1971/3319 cut-off events. [2024-11-19 09:56:36,093 INFO L125 PetriNetUnfolderBase]: For 16377/16377 co-relation queries the response was YES. [2024-11-19 09:56:36,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14005 conditions, 3319 events. 1971/3319 cut-off events. For 16377/16377 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17645 event pairs, 1186 based on Foata normal form. 8/3327 useless extension candidates. Maximal degree in co-relation 12718. Up to 2884 conditions per place. [2024-11-19 09:56:36,111 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 96 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-11-19 09:56:36,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1653 flow [2024-11-19 09:56:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2024-11-19 09:56:36,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-11-19 09:56:36,113 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 1310 flow. Second operand 5 states and 193 transitions. [2024-11-19 09:56:36,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1653 flow [2024-11-19 09:56:36,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1603 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:36,149 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 1365 flow [2024-11-19 09:56:36,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1365, PETRI_PLACES=106, PETRI_TRANSITIONS=115} [2024-11-19 09:56:36,150 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2024-11-19 09:56:36,150 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 1365 flow [2024-11-19 09:56:36,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 09:56:36,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:36,150 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] [2024-11-19 09:56:36,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 09:56:36,150 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:36,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1944427581, now seen corresponding path program 2 times [2024-11-19 09:56:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:36,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181117612] [2024-11-19 09:56:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:36,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:36,169 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:36,169 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:36,278 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 09:56:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181117612] [2024-11-19 09:56:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181117612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:36,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:36,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:56:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351915401] [2024-11-19 09:56:36,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:36,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:36,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:36,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 1365 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 09:56:36,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:36,800 INFO L124 PetriNetUnfolderBase]: 1903/3179 cut-off events. [2024-11-19 09:56:36,800 INFO L125 PetriNetUnfolderBase]: For 16534/16534 co-relation queries the response was YES. [2024-11-19 09:56:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13454 conditions, 3179 events. 1903/3179 cut-off events. For 16534/16534 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16533 event pairs, 1042 based on Foata normal form. 40/3219 useless extension candidates. Maximal degree in co-relation 12173. Up to 2588 conditions per place. [2024-11-19 09:56:36,819 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 112 selfloop transitions, 37 changer transitions 0/150 dead transitions. [2024-11-19 09:56:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1861 flow [2024-11-19 09:56:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:56:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:56:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-19 09:56:36,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-19 09:56:36,821 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 1365 flow. Second operand 6 states and 230 transitions. [2024-11-19 09:56:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1861 flow [2024-11-19 09:56:36,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1797 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:36,863 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 1411 flow [2024-11-19 09:56:36,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1411, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-11-19 09:56:36,865 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 49 predicate places. [2024-11-19 09:56:36,866 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 1411 flow [2024-11-19 09:56:36,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 09:56:36,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:36,866 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:36,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 09:56:36,866 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:56:36,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash -205713903, now seen corresponding path program 1 times [2024-11-19 09:56:36,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:36,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77259647] [2024-11-19 09:56:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:36,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:37,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:37,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77259647] [2024-11-19 09:56:37,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77259647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:37,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893431408] [2024-11-19 09:56:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:37,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:37,204 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 09:56:37,204 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 09:56:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:37,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:56:37,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:37,326 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 09:56:37,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:56:37,502 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 09:56:37,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:37,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 09:56:37,802 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:56:37,803 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 62 treesize of output 41 [2024-11-19 09:56:37,871 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 09:56:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893431408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:37,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:37,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-19 09:56:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35365118] [2024-11-19 09:56:37,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:37,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:56:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:56:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:56:39,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:56:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 1411 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 09:56:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:56:39,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:44,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:48,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:52,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:56,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:57:01,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:57:05,084 WARN L539 Checker$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 09:57:09,090 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 [] [2024-11-19 09:57:10,545 INFO L124 PetriNetUnfolderBase]: 3997/6763 cut-off events. [2024-11-19 09:57:10,545 INFO L125 PetriNetUnfolderBase]: For 26306/26306 co-relation queries the response was YES. [2024-11-19 09:57:10,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26568 conditions, 6763 events. 3997/6763 cut-off events. For 26306/26306 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40532 event pairs, 448 based on Foata normal form. 130/6893 useless extension candidates. Maximal degree in co-relation 24752. Up to 1185 conditions per place. [2024-11-19 09:57:10,573 INFO L140 encePairwiseOnDemand]: 41/64 looper letters, 306 selfloop transitions, 143 changer transitions 262/712 dead transitions. [2024-11-19 09:57:10,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 712 transitions, 6732 flow [2024-11-19 09:57:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-19 09:57:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-19 09:57:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1970 transitions. [2024-11-19 09:57:10,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5919471153846154 [2024-11-19 09:57:10,578 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 1411 flow. Second operand 52 states and 1970 transitions. [2024-11-19 09:57:10,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 712 transitions, 6732 flow [2024-11-19 09:57:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 712 transitions, 6572 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-19 09:57:10,654 INFO L231 Difference]: Finished difference. Result has 194 places, 195 transitions, 2625 flow [2024-11-19 09:57:10,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2625, PETRI_PLACES=194, PETRI_TRANSITIONS=195} [2024-11-19 09:57:10,654 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 133 predicate places. [2024-11-19 09:57:10,655 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 195 transitions, 2625 flow [2024-11-19 09:57:10,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 09:57:10,655 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:57:10,655 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:57:10,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:57:10,855 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,SelfDestructingSolverStorable24 [2024-11-19 09:57:10,856 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:57:10,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:57:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1204907785, now seen corresponding path program 2 times [2024-11-19 09:57:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:57:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306525708] [2024-11-19 09:57:10,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:57:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:10,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:57:10,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:57:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:57:11,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:11,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306525708] [2024-11-19 09:57:11,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306525708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:57:11,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254535024] [2024-11-19 09:57:11,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:57:11,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:57:11,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:57:11,041 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 09:57:11,042 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 09:57:11,122 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:57:11,122 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:57:11,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:57:11,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:57:11,160 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 09:57:11,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:57:11,324 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 09:57:11,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:57:11,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 09:57:11,644 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:57:11,645 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 62 treesize of output 41 [2024-11-19 09:57:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:57:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254535024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:57:11,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:57:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-19 09:57:11,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471759848] [2024-11-19 09:57:11,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:57:11,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:57:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:57:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:57:12,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:57:12,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 195 transitions, 2625 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 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 09:57:12,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:12,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:57:12,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:14,068 INFO L124 PetriNetUnfolderBase]: 3262/5615 cut-off events. [2024-11-19 09:57:14,069 INFO L125 PetriNetUnfolderBase]: For 60763/60763 co-relation queries the response was YES. [2024-11-19 09:57:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30520 conditions, 5615 events. 3262/5615 cut-off events. For 60763/60763 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 32338 event pairs, 803 based on Foata normal form. 53/5668 useless extension candidates. Maximal degree in co-relation 30310. Up to 2811 conditions per place. [2024-11-19 09:57:14,113 INFO L140 encePairwiseOnDemand]: 44/64 looper letters, 209 selfloop transitions, 97 changer transitions 133/440 dead transitions. [2024-11-19 09:57:14,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 440 transitions, 5515 flow [2024-11-19 09:57:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 09:57:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-19 09:57:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1038 transitions. [2024-11-19 09:57:14,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5592672413793104 [2024-11-19 09:57:14,116 INFO L175 Difference]: Start difference. First operand has 194 places, 195 transitions, 2625 flow. Second operand 29 states and 1038 transitions. [2024-11-19 09:57:14,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 440 transitions, 5515 flow [2024-11-19 09:57:14,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 440 transitions, 4796 flow, removed 287 selfloop flow, removed 25 redundant places. [2024-11-19 09:57:14,321 INFO L231 Difference]: Finished difference. Result has 187 places, 191 transitions, 2298 flow [2024-11-19 09:57:14,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2298, PETRI_PLACES=187, PETRI_TRANSITIONS=191} [2024-11-19 09:57:14,322 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 126 predicate places. [2024-11-19 09:57:14,322 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 191 transitions, 2298 flow [2024-11-19 09:57:14,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 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 09:57:14,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:57:14,323 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-11-19 09:57:14,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:57:14,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 09:57:14,523 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:57:14,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:57:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash 426637508, now seen corresponding path program 3 times [2024-11-19 09:57:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:57:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141416672] [2024-11-19 09:57:14,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:57:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:14,562 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:57:14,562 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:57:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:57:14,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:14,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141416672] [2024-11-19 09:57:14,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141416672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:57:14,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:57:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:57:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622310771] [2024-11-19 09:57:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:57:14,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:57:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:57:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:57:14,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:57:14,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 191 transitions, 2298 flow. Second operand has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 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 09:57:14,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:14,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:57:14,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:15,641 INFO L124 PetriNetUnfolderBase]: 2633/4409 cut-off events. [2024-11-19 09:57:15,641 INFO L125 PetriNetUnfolderBase]: For 42701/42701 co-relation queries the response was YES. [2024-11-19 09:57:15,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23728 conditions, 4409 events. 2633/4409 cut-off events. For 42701/42701 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 23347 event pairs, 1060 based on Foata normal form. 81/4490 useless extension candidates. Maximal degree in co-relation 23665. Up to 2729 conditions per place. [2024-11-19 09:57:15,667 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 231 selfloop transitions, 72 changer transitions 0/304 dead transitions. [2024-11-19 09:57:15,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 304 transitions, 3970 flow [2024-11-19 09:57:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:57:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:57:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-19 09:57:15,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5642361111111112 [2024-11-19 09:57:15,669 INFO L175 Difference]: Start difference. First operand has 187 places, 191 transitions, 2298 flow. Second operand 9 states and 325 transitions. [2024-11-19 09:57:15,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 304 transitions, 3970 flow [2024-11-19 09:57:15,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 304 transitions, 3637 flow, removed 125 selfloop flow, removed 17 redundant places. [2024-11-19 09:57:15,793 INFO L231 Difference]: Finished difference. Result has 154 places, 203 transitions, 2423 flow [2024-11-19 09:57:15,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=154, PETRI_TRANSITIONS=203} [2024-11-19 09:57:15,794 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 93 predicate places. [2024-11-19 09:57:15,794 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 203 transitions, 2423 flow [2024-11-19 09:57:15,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 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 09:57:15,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:57:15,795 INFO L204 CegarLoopForPetriNet]: trace histogram [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 09:57:15,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-19 09:57:15,795 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:57:15,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:57:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash -622871357, now seen corresponding path program 1 times [2024-11-19 09:57:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:57:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061941342] [2024-11-19 09:57:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:15,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061941342] [2024-11-19 09:57:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061941342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:57:15,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764499372] [2024-11-19 09:57:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:15,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:57:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:57:15,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:57:15,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:57:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:16,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:57:16,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:57:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:16,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:57:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764499372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:57:16,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:57:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-19 09:57:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979302915] [2024-11-19 09:57:16,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:57:16,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:57:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:57:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:57:16,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 64 [2024-11-19 09:57:16,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 2423 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 09:57:16,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:16,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 64 [2024-11-19 09:57:16,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:21,346 INFO L124 PetriNetUnfolderBase]: 3975/7209 cut-off events. [2024-11-19 09:57:21,346 INFO L125 PetriNetUnfolderBase]: For 49852/49856 co-relation queries the response was YES. [2024-11-19 09:57:21,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34396 conditions, 7209 events. 3975/7209 cut-off events. For 49852/49856 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 47671 event pairs, 993 based on Foata normal form. 56/7265 useless extension candidates. Maximal degree in co-relation 34339. Up to 1977 conditions per place. [2024-11-19 09:57:21,521 INFO L140 encePairwiseOnDemand]: 41/64 looper letters, 661 selfloop transitions, 257 changer transitions 56/976 dead transitions. [2024-11-19 09:57:21,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 976 transitions, 9888 flow [2024-11-19 09:57:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-19 09:57:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-19 09:57:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 2997 transitions. [2024-11-19 09:57:21,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5445130813953488 [2024-11-19 09:57:21,531 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 2423 flow. Second operand 86 states and 2997 transitions. [2024-11-19 09:57:21,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 976 transitions, 9888 flow [2024-11-19 09:57:21,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 976 transitions, 9582 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-19 09:57:21,693 INFO L231 Difference]: Finished difference. Result has 299 places, 441 transitions, 5931 flow [2024-11-19 09:57:21,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=5931, PETRI_PLACES=299, PETRI_TRANSITIONS=441} [2024-11-19 09:57:21,694 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 238 predicate places. [2024-11-19 09:57:21,694 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 441 transitions, 5931 flow [2024-11-19 09:57:21,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 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 09:57:21,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:57:21,695 INFO L204 CegarLoopForPetriNet]: trace histogram [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 09:57:21,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:57:21,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 09:57:21,896 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2024-11-19 09:57:21,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:57:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2047727364, now seen corresponding path program 1 times [2024-11-19 09:57:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:57:21,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645944748] [2024-11-19 09:57:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:22,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645944748] [2024-11-19 09:57:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645944748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:57:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51776608] [2024-11-19 09:57:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:22,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:57:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:57:22,423 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:57:22,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:57:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:22,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:57:22,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:57:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:22,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:57:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51776608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:57:23,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:57:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-11-19 09:57:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585484213] [2024-11-19 09:57:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:57:23,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 09:57:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 09:57:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2024-11-19 09:57:23,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-19 09:57:23,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 441 transitions, 5931 flow. Second operand has 30 states, 30 states have (on average 27.666666666666668) internal successors, (830), 30 states have internal predecessors, (830), 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 09:57:23,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:23,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-19 09:57:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:26,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []