./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/chl-word-subst.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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:48:03,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:48:03,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:48:03,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:48:03,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:48:03,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:48:03,221 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:48:03,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:48:03,222 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:48:03,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:48:03,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:48:03,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:48:03,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:48:03,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:48:03,224 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:48:03,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:48:03,225 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:48:03,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:48:03,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:48:03,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:48:03,226 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:48:03,227 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:48:03,228 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:48:03,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:48:03,228 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:48:03,229 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:48:03,229 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:48:03,229 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:48:03,230 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:48:03,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:48:03,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:48:03,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:48:03,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:48:03,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:03,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:48:03,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:48:03,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:48:03,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:48:03,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:48:03,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:48:03,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:48:03,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:48:03,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-09 10:48:03,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:48:03,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:48:03,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:48:03,419 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:48:03,420 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:48:03,420 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-09 10:48:04,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:48:05,045 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:48:05,045 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-09 10:48:05,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2327161ab/510d09c086cf4fdeb2eeb85fd0d3c51f/FLAG8d31156bb [2024-11-09 10:48:05,436 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2327161ab/510d09c086cf4fdeb2eeb85fd0d3c51f [2024-11-09 10:48:05,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:48:05,439 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:48:05,441 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:05,441 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:48:05,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:48:05,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e2f668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05, skipping insertion in model container [2024-11-09 10:48:05,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,534 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:48:05,743 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:48:05,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:05,757 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:48:05,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:05,817 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:48:05,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05 WrapperNode [2024-11-09 10:48:05,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:05,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:05,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:48:05,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:48:05,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,864 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 171 [2024-11-09 10:48:05,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:05,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:48:05,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:48:05,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:48:05,878 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,904 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:48:05,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,922 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:48:05,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:48:05,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:48:05,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:48:05,938 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (1/1) ... [2024-11-09 10:48:05,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:05,968 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) [2024-11-09 10:48:05,972 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 [2024-11-09 10:48:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:48:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:48:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:48:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:48:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:48:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:48:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:48:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:48:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:48:06,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:48:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:48:06,014 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:48:06,131 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:48:06,133 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:48:06,549 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:48:06,549 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:48:06,902 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:48:06,902 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:48:06,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:06 BoogieIcfgContainer [2024-11-09 10:48:06,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:48:06,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:48:06,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:48:06,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:48:06,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:05" (1/3) ... [2024-11-09 10:48:06,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661391a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:06, skipping insertion in model container [2024-11-09 10:48:06,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:05" (2/3) ... [2024-11-09 10:48:06,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661391a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:06, skipping insertion in model container [2024-11-09 10:48:06,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:06" (3/3) ... [2024-11-09 10:48:06,913 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-09 10:48:06,930 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:48:06,930 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-09 10:48:06,930 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:48:06,994 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:48:07,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-11-09 10:48:07,070 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-11-09 10:48:07,074 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:48:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 327 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-09 10:48:07,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-11-09 10:48:07,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-11-09 10:48:07,094 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:48:07,101 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;@213e0739, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:48:07,102 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-09 10:48:07,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:48:07,105 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:48:07,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:48:07,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:07,109 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:48:07,109 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:07,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash 791289, now seen corresponding path program 1 times [2024-11-09 10:48:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308614248] [2024-11-09 10:48:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308614248] [2024-11-09 10:48:07,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308614248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:07,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:07,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:48:07,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580832376] [2024-11-09 10:48:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:07,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:48:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:48:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:48:07,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:07,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-09 10:48:07,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:07,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:07,950 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-11-09 10:48:07,951 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-09 10:48:07,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34539 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-11-09 10:48:07,987 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-09 10:48:07,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-11-09 10:48:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:48:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:48:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-09 10:48:07,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-09 10:48:08,000 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-09 10:48:08,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-11-09 10:48:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:48:08,012 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-11-09 10:48:08,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-09 10:48:08,017 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-09 10:48:08,018 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-11-09 10:48:08,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-09 10:48:08,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:08,018 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:48:08,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:48:08,019 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:08,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 791290, now seen corresponding path program 1 times [2024-11-09 10:48:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:08,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049917996] [2024-11-09 10:48:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049917996] [2024-11-09 10:48:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049917996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:08,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:48:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461749080] [2024-11-09 10:48:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:08,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:08,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:08,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 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) [2024-11-09 10:48:08,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:08,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:08,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:08,993 INFO L124 PetriNetUnfolderBase]: 2713/4950 cut-off events. [2024-11-09 10:48:08,993 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-09 10:48:08,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 4950 events. 2713/4950 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34569 event pairs, 1692 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 8556. Up to 3580 conditions per place. [2024-11-09 10:48:09,016 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 49 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-11-09 10:48:09,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 296 flow [2024-11-09 10:48:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-09 10:48:09,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-09 10:48:09,019 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 230 transitions. [2024-11-09 10:48:09,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 296 flow [2024-11-09 10:48:09,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:09,021 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 207 flow [2024-11-09 10:48:09,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-11-09 10:48:09,021 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-09 10:48:09,022 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 207 flow [2024-11-09 10:48:09,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 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) [2024-11-09 10:48:09,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:09,023 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:48:09,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:48:09,023 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:09,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash 24530088, now seen corresponding path program 1 times [2024-11-09 10:48:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220295378] [2024-11-09 10:48:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:09,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220295378] [2024-11-09 10:48:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220295378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:09,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109867530] [2024-11-09 10:48:09,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:09,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:09,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:09,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:09,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:09,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:09,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:09,880 INFO L124 PetriNetUnfolderBase]: 2714/4953 cut-off events. [2024-11-09 10:48:09,884 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-09 10:48:09,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8610 conditions, 4953 events. 2714/4953 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34555 event pairs, 1692 based on Foata normal form. 0/3397 useless extension candidates. Maximal degree in co-relation 8585. Up to 3579 conditions per place. [2024-11-09 10:48:09,943 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 49 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-09 10:48:09,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 325 flow [2024-11-09 10:48:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-09 10:48:09,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-09 10:48:09,945 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 207 flow. Second operand 5 states and 277 transitions. [2024-11-09 10:48:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 325 flow [2024-11-09 10:48:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:09,951 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 241 flow [2024-11-09 10:48:09,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-09 10:48:09,952 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-09 10:48:09,952 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 241 flow [2024-11-09 10:48:09,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:09,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:09,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:48:09,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:48:09,953 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:09,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash 760433302, now seen corresponding path program 1 times [2024-11-09 10:48:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:09,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720126318] [2024-11-09 10:48:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:09,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:10,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:10,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720126318] [2024-11-09 10:48:10,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720126318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:10,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:10,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:10,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789845327] [2024-11-09 10:48:10,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:10,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:10,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:10,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:10,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-11-09 10:48:10,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:10,619 INFO L124 PetriNetUnfolderBase]: 2715/4956 cut-off events. [2024-11-09 10:48:10,619 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-09 10:48:10,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8632 conditions, 4956 events. 2715/4956 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34602 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8601. Up to 3582 conditions per place. [2024-11-09 10:48:10,644 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 50 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-09 10:48:10,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 365 flow [2024-11-09 10:48:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-09 10:48:10,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-09 10:48:10,646 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 241 flow. Second operand 5 states and 277 transitions. [2024-11-09 10:48:10,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 365 flow [2024-11-09 10:48:10,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:10,649 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 283 flow [2024-11-09 10:48:10,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-11-09 10:48:10,650 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-09 10:48:10,650 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 283 flow [2024-11-09 10:48:10,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-11-09 10:48:10,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:10,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:48:10,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:48:10,651 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:10,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash 760455063, now seen corresponding path program 1 times [2024-11-09 10:48:10,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:10,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520966683] [2024-11-09 10:48:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:10,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520966683] [2024-11-09 10:48:10,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520966683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340443408] [2024-11-09 10:48:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:10,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:10,875 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) [2024-11-09 10:48:10,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:48:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:10,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:48:10,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:11,009 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 [2024-11-09 10:48:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:11,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:11,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340443408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:11,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:11,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:48:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176182088] [2024-11-09 10:48:11,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:11,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:48:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:48:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:48:12,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:12,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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) [2024-11-09 10:48:12,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:12,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:12,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:12,814 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-11-09 10:48:12,815 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-09 10:48:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 4955 events. 2715/4955 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34587 event pairs, 1692 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 8616. Up to 3582 conditions per place. [2024-11-09 10:48:12,844 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 51 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-09 10:48:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 395 flow [2024-11-09 10:48:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-09 10:48:12,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503472222222222 [2024-11-09 10:48:12,846 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 283 flow. Second operand 6 states and 317 transitions. [2024-11-09 10:48:12,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 395 flow [2024-11-09 10:48:12,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:12,848 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 286 flow [2024-11-09 10:48:12,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-11-09 10:48:12,849 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-11-09 10:48:12,849 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 286 flow [2024-11-09 10:48:12,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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) [2024-11-09 10:48:12,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:12,850 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:48:12,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:48:13,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:13,051 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:13,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2098602676, now seen corresponding path program 1 times [2024-11-09 10:48:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:13,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600647096] [2024-11-09 10:48:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:13,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:13,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:13,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600647096] [2024-11-09 10:48:13,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600647096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:13,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669130510] [2024-11-09 10:48:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:13,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:13,238 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) [2024-11-09 10:48:13,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:48:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:13,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:13,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:13,313 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 [2024-11-09 10:48:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:13,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669130510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:13,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:13,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:48:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236320877] [2024-11-09 10:48:13,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:13,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:14,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:14,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-09 10:48:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:15,007 INFO L124 PetriNetUnfolderBase]: 2717/4960 cut-off events. [2024-11-09 10:48:15,008 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-09 10:48:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 4960 events. 2717/4960 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34635 event pairs, 1692 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8622. Up to 3575 conditions per place. [2024-11-09 10:48:15,035 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-11-09 10:48:15,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 443 flow [2024-11-09 10:48:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 458 transitions. [2024-11-09 10:48:15,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-11-09 10:48:15,037 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 286 flow. Second operand 9 states and 458 transitions. [2024-11-09 10:48:15,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 443 flow [2024-11-09 10:48:15,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 396 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:48:15,041 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 306 flow [2024-11-09 10:48:15,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-11-09 10:48:15,041 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-09 10:48:15,041 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 306 flow [2024-11-09 10:48:15,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-09 10:48:15,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:15,042 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 10:48:15,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:48:15,251 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 [2024-11-09 10:48:15,251 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:15,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash 631987656, now seen corresponding path program 1 times [2024-11-09 10:48:15,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:15,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651835035] [2024-11-09 10:48:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:15,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651835035] [2024-11-09 10:48:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651835035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842670951] [2024-11-09 10:48:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:15,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:15,464 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) [2024-11-09 10:48:15,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:48:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:15,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:15,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:15,547 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 [2024-11-09 10:48:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:15,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842670951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:15,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:15,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:48:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024387382] [2024-11-09 10:48:15,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:15,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:16,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:16,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 306 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 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) [2024-11-09 10:48:16,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:16,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:16,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:17,283 INFO L124 PetriNetUnfolderBase]: 2718/4962 cut-off events. [2024-11-09 10:48:17,283 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-09 10:48:17,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8671 conditions, 4962 events. 2718/4962 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34638 event pairs, 1692 based on Foata normal form. 0/3411 useless extension candidates. Maximal degree in co-relation 8607. Up to 3577 conditions per place. [2024-11-09 10:48:17,305 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 43 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-09 10:48:17,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 444 flow [2024-11-09 10:48:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-09 10:48:17,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-09 10:48:17,307 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 306 flow. Second operand 9 states and 457 transitions. [2024-11-09 10:48:17,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 444 flow [2024-11-09 10:48:17,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 411 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:17,309 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 325 flow [2024-11-09 10:48:17,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-11-09 10:48:17,312 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2024-11-09 10:48:17,312 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 325 flow [2024-11-09 10:48:17,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 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) [2024-11-09 10:48:17,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:17,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:17,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:48:17,513 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 [2024-11-09 10:48:17,514 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:17,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1895181944, now seen corresponding path program 1 times [2024-11-09 10:48:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:17,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516136058] [2024-11-09 10:48:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516136058] [2024-11-09 10:48:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516136058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255737672] [2024-11-09 10:48:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:17,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:17,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:17,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-09 10:48:17,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:17,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:17,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:18,096 INFO L124 PetriNetUnfolderBase]: 5204/9287 cut-off events. [2024-11-09 10:48:18,096 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-09 10:48:18,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 9287 events. 5204/9287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69657 event pairs, 2894 based on Foata normal form. 0/6441 useless extension candidates. Maximal degree in co-relation 9724. Up to 4040 conditions per place. [2024-11-09 10:48:18,134 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 131 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2024-11-09 10:48:18,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 833 flow [2024-11-09 10:48:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2024-11-09 10:48:18,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6892361111111112 [2024-11-09 10:48:18,136 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 325 flow. Second operand 6 states and 397 transitions. [2024-11-09 10:48:18,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 833 flow [2024-11-09 10:48:18,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 177 transitions, 755 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-09 10:48:18,138 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 355 flow [2024-11-09 10:48:18,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-11-09 10:48:18,139 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 9 predicate places. [2024-11-09 10:48:18,139 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 355 flow [2024-11-09 10:48:18,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-09 10:48:18,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:18,140 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:18,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:48:18,140 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:18,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1500049067, now seen corresponding path program 1 times [2024-11-09 10:48:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:18,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403577084] [2024-11-09 10:48:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403577084] [2024-11-09 10:48:18,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403577084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:18,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:18,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078577575] [2024-11-09 10:48:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:18,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:18,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:18,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-09 10:48:18,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:18,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:18,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:19,398 INFO L124 PetriNetUnfolderBase]: 9500/17358 cut-off events. [2024-11-09 10:48:19,398 INFO L125 PetriNetUnfolderBase]: For 1723/1723 co-relation queries the response was YES. [2024-11-09 10:48:19,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31888 conditions, 17358 events. 9500/17358 cut-off events. For 1723/1723 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 146263 event pairs, 5298 based on Foata normal form. 114/12673 useless extension candidates. Maximal degree in co-relation 22620. Up to 6942 conditions per place. [2024-11-09 10:48:19,589 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 129 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-11-09 10:48:19,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 831 flow [2024-11-09 10:48:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 391 transitions. [2024-11-09 10:48:19,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6788194444444444 [2024-11-09 10:48:19,593 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 355 flow. Second operand 6 states and 391 transitions. [2024-11-09 10:48:19,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 831 flow [2024-11-09 10:48:19,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 826 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:19,603 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 459 flow [2024-11-09 10:48:19,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-11-09 10:48:19,608 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 15 predicate places. [2024-11-09 10:48:19,608 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 459 flow [2024-11-09 10:48:19,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-09 10:48:19,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:19,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:19,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:48:19,608 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:19,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1141308600, now seen corresponding path program 1 times [2024-11-09 10:48:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:19,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303828024] [2024-11-09 10:48:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:19,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:19,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303828024] [2024-11-09 10:48:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303828024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:19,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:48:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294921838] [2024-11-09 10:48:19,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:19,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:19,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:19,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-09 10:48:19,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:19,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:19,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:20,835 INFO L124 PetriNetUnfolderBase]: 8828/16125 cut-off events. [2024-11-09 10:48:20,835 INFO L125 PetriNetUnfolderBase]: For 5616/5616 co-relation queries the response was YES. [2024-11-09 10:48:20,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31100 conditions, 16125 events. 8828/16125 cut-off events. For 5616/5616 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 133281 event pairs, 5194 based on Foata normal form. 0/11710 useless extension candidates. Maximal degree in co-relation 23027. Up to 7333 conditions per place. [2024-11-09 10:48:20,921 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 132 selfloop transitions, 12 changer transitions 0/180 dead transitions. [2024-11-09 10:48:20,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 180 transitions, 937 flow [2024-11-09 10:48:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2024-11-09 10:48:20,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-09 10:48:20,924 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 459 flow. Second operand 6 states and 390 transitions. [2024-11-09 10:48:20,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 180 transitions, 937 flow [2024-11-09 10:48:20,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:20,931 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 499 flow [2024-11-09 10:48:20,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2024-11-09 10:48:20,933 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 21 predicate places. [2024-11-09 10:48:20,934 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 499 flow [2024-11-09 10:48:20,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-11-09 10:48:20,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:20,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:20,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:48:20,935 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:20,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash -393930269, now seen corresponding path program 1 times [2024-11-09 10:48:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722677286] [2024-11-09 10:48:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722677286] [2024-11-09 10:48:21,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722677286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:21,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:21,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:21,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360254601] [2024-11-09 10:48:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:21,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:21,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:21,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:21,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-09 10:48:21,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:21,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:21,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:22,018 INFO L124 PetriNetUnfolderBase]: 7930/14288 cut-off events. [2024-11-09 10:48:22,018 INFO L125 PetriNetUnfolderBase]: For 6615/6615 co-relation queries the response was YES. [2024-11-09 10:48:22,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29344 conditions, 14288 events. 7930/14288 cut-off events. For 6615/6615 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 112435 event pairs, 4896 based on Foata normal form. 0/10878 useless extension candidates. Maximal degree in co-relation 21567. Up to 6606 conditions per place. [2024-11-09 10:48:22,085 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 131 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-11-09 10:48:22,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 179 transitions, 977 flow [2024-11-09 10:48:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:48:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:48:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-11-09 10:48:22,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6649305555555556 [2024-11-09 10:48:22,089 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 499 flow. Second operand 6 states and 383 transitions. [2024-11-09 10:48:22,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 179 transitions, 977 flow [2024-11-09 10:48:22,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:48:22,101 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 528 flow [2024-11-09 10:48:22,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-09 10:48:22,101 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-11-09 10:48:22,101 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 528 flow [2024-11-09 10:48:22,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-09 10:48:22,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:22,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:22,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:48:22,102 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:22,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -214311031, now seen corresponding path program 1 times [2024-11-09 10:48:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:22,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646282423] [2024-11-09 10:48:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:22,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646282423] [2024-11-09 10:48:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646282423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:22,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116203495] [2024-11-09 10:48:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:22,510 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) [2024-11-09 10:48:22,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:48:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:22,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:48:22,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:22,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:48:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:22,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:22,653 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:48:22,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:48:22,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:22,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:22,693 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:22,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:48:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:22,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:22,875 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 162 treesize of output 156 [2024-11-09 10:48:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:22,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116203495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:22,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:22,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-09 10:48:22,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522204585] [2024-11-09 10:48:22,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:22,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:48:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:48:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:48:28,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-09 10:48:28,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 528 flow. Second operand has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 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) [2024-11-09 10:48:28,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:28,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-09 10:48:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:30,567 INFO L124 PetriNetUnfolderBase]: 15810/25408 cut-off events. [2024-11-09 10:48:30,567 INFO L125 PetriNetUnfolderBase]: For 9124/9124 co-relation queries the response was YES. [2024-11-09 10:48:30,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54942 conditions, 25408 events. 15810/25408 cut-off events. For 9124/9124 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 183980 event pairs, 6452 based on Foata normal form. 0/20964 useless extension candidates. Maximal degree in co-relation 36791. Up to 8004 conditions per place. [2024-11-09 10:48:30,701 INFO L140 encePairwiseOnDemand]: 79/96 looper letters, 170 selfloop transitions, 30 changer transitions 0/224 dead transitions. [2024-11-09 10:48:30,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 224 transitions, 1218 flow [2024-11-09 10:48:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 463 transitions. [2024-11-09 10:48:30,706 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5358796296296297 [2024-11-09 10:48:30,706 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 528 flow. Second operand 9 states and 463 transitions. [2024-11-09 10:48:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 224 transitions, 1218 flow [2024-11-09 10:48:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 224 transitions, 1200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:48:30,726 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 607 flow [2024-11-09 10:48:30,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-11-09 10:48:30,726 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2024-11-09 10:48:30,726 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 607 flow [2024-11-09 10:48:30,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 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) [2024-11-09 10:48:30,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:30,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:30,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:48:30,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:30,927 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:30,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 216834790, now seen corresponding path program 1 times [2024-11-09 10:48:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865836481] [2024-11-09 10:48:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865836481] [2024-11-09 10:48:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865836481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168966132] [2024-11-09 10:48:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:31,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:31,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:31,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-09 10:48:31,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:31,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:31,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:33,185 INFO L124 PetriNetUnfolderBase]: 17406/31568 cut-off events. [2024-11-09 10:48:33,186 INFO L125 PetriNetUnfolderBase]: For 25060/25106 co-relation queries the response was YES. [2024-11-09 10:48:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70674 conditions, 31568 events. 17406/31568 cut-off events. For 25060/25106 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 272744 event pairs, 10416 based on Foata normal form. 273/26295 useless extension candidates. Maximal degree in co-relation 50832. Up to 13223 conditions per place. [2024-11-09 10:48:33,333 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 153 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2024-11-09 10:48:33,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 1319 flow [2024-11-09 10:48:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-11-09 10:48:33,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-09 10:48:33,335 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 607 flow. Second operand 5 states and 338 transitions. [2024-11-09 10:48:33,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 1319 flow [2024-11-09 10:48:33,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 202 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-09 10:48:33,358 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 628 flow [2024-11-09 10:48:33,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-09 10:48:33,359 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 29 predicate places. [2024-11-09 10:48:33,359 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 628 flow [2024-11-09 10:48:33,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2024-11-09 10:48:33,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:33,360 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:33,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:48:33,360 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:33,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293397, now seen corresponding path program 1 times [2024-11-09 10:48:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920254235] [2024-11-09 10:48:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920254235] [2024-11-09 10:48:33,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920254235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:33,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:33,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074053278] [2024-11-09 10:48:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:33,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:33,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:33,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-09 10:48:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 628 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-11-09 10:48:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-09 10:48:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:35,749 INFO L124 PetriNetUnfolderBase]: 20661/35140 cut-off events. [2024-11-09 10:48:35,750 INFO L125 PetriNetUnfolderBase]: For 30262/30262 co-relation queries the response was YES. [2024-11-09 10:48:35,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82839 conditions, 35140 events. 20661/35140 cut-off events. For 30262/30262 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 283613 event pairs, 14989 based on Foata normal form. 0/31790 useless extension candidates. Maximal degree in co-relation 60372. Up to 28154 conditions per place. [2024-11-09 10:48:35,918 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 82 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-11-09 10:48:35,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 812 flow [2024-11-09 10:48:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-09 10:48:35,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-11-09 10:48:35,919 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 628 flow. Second operand 5 states and 239 transitions. [2024-11-09 10:48:35,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 812 flow [2024-11-09 10:48:35,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:48:35,943 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 639 flow [2024-11-09 10:48:35,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-09 10:48:35,945 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2024-11-09 10:48:35,945 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 639 flow [2024-11-09 10:48:35,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-11-09 10:48:35,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:35,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:35,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:48:35,945 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:35,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293398, now seen corresponding path program 1 times [2024-11-09 10:48:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:35,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570830879] [2024-11-09 10:48:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570830879] [2024-11-09 10:48:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570830879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745317998] [2024-11-09 10:48:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:36,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:36,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:36,095 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) [2024-11-09 10:48:36,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:48:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:36,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:36,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:36,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:48:36,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:36,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:36,231 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:36,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:48:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:36,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:36,350 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 52 treesize of output 48 [2024-11-09 10:48:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:36,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745317998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:36,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 10:48:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879816582] [2024-11-09 10:48:36,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:36,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:37,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2024-11-09 10:48:37,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 639 flow. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 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) [2024-11-09 10:48:37,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:37,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2024-11-09 10:48:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:39,432 INFO L124 PetriNetUnfolderBase]: 18422/29799 cut-off events. [2024-11-09 10:48:39,432 INFO L125 PetriNetUnfolderBase]: For 25704/25704 co-relation queries the response was YES. [2024-11-09 10:48:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72019 conditions, 29799 events. 18422/29799 cut-off events. For 25704/25704 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 221047 event pairs, 9181 based on Foata normal form. 0/26527 useless extension candidates. Maximal degree in co-relation 52479. Up to 9820 conditions per place. [2024-11-09 10:48:39,703 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 161 selfloop transitions, 34 changer transitions 0/221 dead transitions. [2024-11-09 10:48:39,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 1391 flow [2024-11-09 10:48:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2024-11-09 10:48:39,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-09 10:48:39,705 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 639 flow. Second operand 9 states and 520 transitions. [2024-11-09 10:48:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 1391 flow [2024-11-09 10:48:39,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 221 transitions, 1367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:48:39,747 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 734 flow [2024-11-09 10:48:39,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=734, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2024-11-09 10:48:39,747 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-09 10:48:39,748 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 734 flow [2024-11-09 10:48:39,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 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) [2024-11-09 10:48:39,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:39,748 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:39,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:48:39,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:48:39,953 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:39,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash -406367912, now seen corresponding path program 1 times [2024-11-09 10:48:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222651782] [2024-11-09 10:48:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:40,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:40,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222651782] [2024-11-09 10:48:40,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222651782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:40,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:40,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:48:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240810683] [2024-11-09 10:48:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:40,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:48:40,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:48:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:48:40,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:48:40,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 734 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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) [2024-11-09 10:48:40,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:40,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:48:40,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:41,820 INFO L124 PetriNetUnfolderBase]: 16312/26593 cut-off events. [2024-11-09 10:48:41,820 INFO L125 PetriNetUnfolderBase]: For 35922/35964 co-relation queries the response was YES. [2024-11-09 10:48:41,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68305 conditions, 26593 events. 16312/26593 cut-off events. For 35922/35964 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 193014 event pairs, 10256 based on Foata normal form. 218/24064 useless extension candidates. Maximal degree in co-relation 50457. Up to 13117 conditions per place. [2024-11-09 10:48:41,990 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 150 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-11-09 10:48:41,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 195 transitions, 1450 flow [2024-11-09 10:48:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:48:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:48:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-09 10:48:41,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6895833333333333 [2024-11-09 10:48:41,991 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 734 flow. Second operand 5 states and 331 transitions. [2024-11-09 10:48:41,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 195 transitions, 1450 flow [2024-11-09 10:48:42,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1372 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-09 10:48:42,024 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 752 flow [2024-11-09 10:48:42,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=752, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-11-09 10:48:42,024 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-09 10:48:42,024 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 752 flow [2024-11-09 10:48:42,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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) [2024-11-09 10:48:42,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:42,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:42,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:48:42,025 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:42,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1614320984, now seen corresponding path program 1 times [2024-11-09 10:48:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:42,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875737663] [2024-11-09 10:48:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:42,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875737663] [2024-11-09 10:48:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875737663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912054945] [2024-11-09 10:48:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:42,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:42,358 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) [2024-11-09 10:48:42,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:48:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:42,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:48:42,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:42,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:48:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:42,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:48:42,462 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:42,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:48:42,474 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:48:42,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:48:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:42,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:42,644 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 46 treesize of output 42 [2024-11-09 10:48:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:48:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912054945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:42,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:42,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-09 10:48:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382703854] [2024-11-09 10:48:42,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:42,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:48:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:48:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:48:43,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 96 [2024-11-09 10:48:43,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 752 flow. Second operand has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 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) [2024-11-09 10:48:43,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:43,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 96 [2024-11-09 10:48:43,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:47,067 INFO L124 PetriNetUnfolderBase]: 26924/42995 cut-off events. [2024-11-09 10:48:47,067 INFO L125 PetriNetUnfolderBase]: For 54103/54353 co-relation queries the response was YES. [2024-11-09 10:48:47,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109181 conditions, 42995 events. 26924/42995 cut-off events. For 54103/54353 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 319620 event pairs, 13049 based on Foata normal form. 0/37925 useless extension candidates. Maximal degree in co-relation 82595. Up to 14661 conditions per place. [2024-11-09 10:48:47,287 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 199 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-11-09 10:48:47,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 254 transitions, 1761 flow [2024-11-09 10:48:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:48:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:48:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 518 transitions. [2024-11-09 10:48:47,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-11-09 10:48:47,289 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 752 flow. Second operand 10 states and 518 transitions. [2024-11-09 10:48:47,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 254 transitions, 1761 flow [2024-11-09 10:48:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 254 transitions, 1737 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:47,328 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 842 flow [2024-11-09 10:48:47,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=842, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-09 10:48:47,329 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 43 predicate places. [2024-11-09 10:48:47,329 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 842 flow [2024-11-09 10:48:47,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 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) [2024-11-09 10:48:47,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:47,329 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:47,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:48:47,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:48:47,534 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:47,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:47,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656260, now seen corresponding path program 1 times [2024-11-09 10:48:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094379140] [2024-11-09 10:48:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:47,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094379140] [2024-11-09 10:48:47,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094379140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682683632] [2024-11-09 10:48:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:47,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:47,651 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) [2024-11-09 10:48:47,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:48:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:47,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:48:47,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:47,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:47,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:48:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682683632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:47,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-09 10:48:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563923002] [2024-11-09 10:48:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:47,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:48:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:48:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:48:48,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-09 10:48:48,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 842 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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) [2024-11-09 10:48:48,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:48,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-09 10:48:48,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:50,866 INFO L124 PetriNetUnfolderBase]: 21546/34329 cut-off events. [2024-11-09 10:48:50,867 INFO L125 PetriNetUnfolderBase]: For 53529/53967 co-relation queries the response was YES. [2024-11-09 10:48:50,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92899 conditions, 34329 events. 21546/34329 cut-off events. For 53529/53967 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 249370 event pairs, 10533 based on Foata normal form. 0/32109 useless extension candidates. Maximal degree in co-relation 71026. Up to 11045 conditions per place. [2024-11-09 10:48:51,048 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 175 selfloop transitions, 34 changer transitions 0/235 dead transitions. [2024-11-09 10:48:51,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 1748 flow [2024-11-09 10:48:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:48:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:48:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-11-09 10:48:51,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6711309523809523 [2024-11-09 10:48:51,050 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 842 flow. Second operand 7 states and 451 transitions. [2024-11-09 10:48:51,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 1748 flow [2024-11-09 10:48:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 1692 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:51,091 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 879 flow [2024-11-09 10:48:51,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=879, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2024-11-09 10:48:51,092 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 45 predicate places. [2024-11-09 10:48:51,092 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 879 flow [2024-11-09 10:48:51,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 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) [2024-11-09 10:48:51,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:51,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:51,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:48:51,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:51,297 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:51,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:51,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656261, now seen corresponding path program 1 times [2024-11-09 10:48:51,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:51,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967314594] [2024-11-09 10:48:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:51,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967314594] [2024-11-09 10:48:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967314594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:48:51,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:48:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:48:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519332042] [2024-11-09 10:48:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:48:51,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:48:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:48:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:48:51,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-09 10:48:51,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 879 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:51,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:51,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-09 10:48:51,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:53,953 INFO L124 PetriNetUnfolderBase]: 21908/34613 cut-off events. [2024-11-09 10:48:53,953 INFO L125 PetriNetUnfolderBase]: For 64106/64568 co-relation queries the response was YES. [2024-11-09 10:48:54,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97808 conditions, 34613 events. 21908/34613 cut-off events. For 64106/64568 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 246440 event pairs, 15768 based on Foata normal form. 514/33485 useless extension candidates. Maximal degree in co-relation 71386. Up to 29754 conditions per place. [2024-11-09 10:48:54,196 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 95 selfloop transitions, 13 changer transitions 0/130 dead transitions. [2024-11-09 10:48:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 1087 flow [2024-11-09 10:48:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:48:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:48:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-09 10:48:54,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-11-09 10:48:54,197 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 879 flow. Second operand 4 states and 205 transitions. [2024-11-09 10:48:54,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 1087 flow [2024-11-09 10:48:54,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 130 transitions, 1030 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-09 10:48:54,302 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 840 flow [2024-11-09 10:48:54,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2024-11-09 10:48:54,303 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 39 predicate places. [2024-11-09 10:48:54,303 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 840 flow [2024-11-09 10:48:54,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:54,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:54,304 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:54,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:48:54,304 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:48:54,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1242170762, now seen corresponding path program 1 times [2024-11-09 10:48:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206505939] [2024-11-09 10:48:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206505939] [2024-11-09 10:48:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206505939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164307012] [2024-11-09 10:48:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:54,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:54,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:54,462 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) [2024-11-09 10:48:54,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:48:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:54,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:48:54,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:54,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:48:54,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:48:54,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:48:54,629 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:48:54,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:48:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:54,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:54,832 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 52 treesize of output 48 [2024-11-09 10:48:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:48:54,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164307012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:54,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:54,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 10:48:54,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062843337] [2024-11-09 10:48:54,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:54,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:48:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:48:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:48:55,808 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2024-11-09 10:48:55,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 840 flow. Second operand has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 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) [2024-11-09 10:48:55,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:55,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2024-11-09 10:48:55,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:59,369 INFO L124 PetriNetUnfolderBase]: 28914/43983 cut-off events. [2024-11-09 10:48:59,369 INFO L125 PetriNetUnfolderBase]: For 87709/89158 co-relation queries the response was YES. [2024-11-09 10:48:59,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124368 conditions, 43983 events. 28914/43983 cut-off events. For 87709/89158 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 305868 event pairs, 12769 based on Foata normal form. 0/41628 useless extension candidates. Maximal degree in co-relation 85713. Up to 15493 conditions per place. [2024-11-09 10:48:59,711 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 189 selfloop transitions, 34 changer transitions 0/244 dead transitions. [2024-11-09 10:48:59,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 244 transitions, 1896 flow [2024-11-09 10:48:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:48:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:48:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2024-11-09 10:48:59,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5891203703703703 [2024-11-09 10:48:59,714 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 840 flow. Second operand 9 states and 509 transitions. [2024-11-09 10:48:59,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 244 transitions, 1896 flow [2024-11-09 10:48:59,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 244 transitions, 1882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:48:59,804 INFO L231 Difference]: Finished difference. Result has 136 places, 133 transitions, 933 flow [2024-11-09 10:48:59,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=933, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2024-11-09 10:48:59,804 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2024-11-09 10:48:59,805 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 933 flow [2024-11-09 10:48:59,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 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) [2024-11-09 10:48:59,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:59,805 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:59,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:49:00,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:00,007 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 10:49:00,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -31110897, now seen corresponding path program 1 times [2024-11-09 10:49:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:00,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410847066] [2024-11-09 10:49:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:00,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410847066] [2024-11-09 10:49:00,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410847066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263390186] [2024-11-09 10:49:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:00,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:00,093 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) [2024-11-09 10:49:00,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:49:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:00,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:49:00,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:00,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263390186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:00,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:00,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-09 10:49:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544723812] [2024-11-09 10:49:00,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:00,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:49:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:49:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:49:00,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-09 10:49:00,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 933 flow. Second operand has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 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) [2024-11-09 10:49:00,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:00,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-09 10:49:00,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand