./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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/popl20-more-queue-add-2-nl.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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:54:06,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:54:06,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:54:06,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:54:06,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:54:06,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:54:06,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:54:06,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:54:06,192 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:54:06,192 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:54:06,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:54:06,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:54:06,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:54:06,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:54:06,196 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:54:06,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:54:06,196 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:54:06,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:54:06,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:54:06,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:54:06,197 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:54:06,198 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:54:06,198 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:54:06,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:54:06,202 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:54:06,202 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:54:06,202 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:54:06,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:54:06,203 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:54:06,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:54:06,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:54:06,203 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:54:06,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:54:06,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:54:06,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:54:06,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:54:06,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:54:06,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:54:06,204 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:54:06,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:54:06,205 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:54:06,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:54:06,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-11-09 10:54:06,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:54:06,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:54:06,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:54:06,447 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:54:06,448 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:54:06,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-09 10:54:07,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:54:08,124 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:54:08,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-09 10:54:08,133 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbd348eea/594cec0d80d5446eb07871f3dddf514e/FLAGae8984edb [2024-11-09 10:54:08,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbd348eea/594cec0d80d5446eb07871f3dddf514e [2024-11-09 10:54:08,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:54:08,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:54:08,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:54:08,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:54:08,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:54:08,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db38f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08, skipping insertion in model container [2024-11-09 10:54:08,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,499 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:54:08,677 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 10:54:08,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:54:08,686 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:54:08,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:54:08,733 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:54:08,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08 WrapperNode [2024-11-09 10:54:08,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:54:08,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:54:08,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:54:08,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:54:08,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,764 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 161 [2024-11-09 10:54:08,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:54:08,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:54:08,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:54:08,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:54:08,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,778 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,789 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:54:08,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,794 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:54:08,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:54:08,802 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:54:08,802 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:54:08,803 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (1/1) ... [2024-11-09 10:54:08,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:54:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:08,846 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 10:54:08,851 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 10:54:08,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:54:08,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:54:08,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:54:08,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:54:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:54:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:54:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:54:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:54:08,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:54:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:54:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:54:08,895 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 10:54:08,974 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:54:08,976 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:54:09,218 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:54:09,218 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:54:09,478 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:54:09,479 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:54:09,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:09 BoogieIcfgContainer [2024-11-09 10:54:09,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:54:09,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:54:09,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:54:09,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:54:09,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:54:08" (1/3) ... [2024-11-09 10:54:09,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc13fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:09, skipping insertion in model container [2024-11-09 10:54:09,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:08" (2/3) ... [2024-11-09 10:54:09,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc13fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:09, skipping insertion in model container [2024-11-09 10:54:09,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:09" (3/3) ... [2024-11-09 10:54:09,491 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-11-09 10:54:09,509 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:54:09,510 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-09 10:54:09,510 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:54:09,569 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:54:09,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:54:09,631 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-09 10:54:09,632 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:54:09,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 76 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-09 10:54:09,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:54:09,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-09 10:54:09,665 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:54:09,677 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;@7eea48a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:54:09,677 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-09 10:54:09,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:54:09,688 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:54:09,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:54:09,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:09,689 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:54:09,689 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:09,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 515660, now seen corresponding path program 1 times [2024-11-09 10:54:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:09,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728125668] [2024-11-09 10:54:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:10,105 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 10:54:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728125668] [2024-11-09 10:54:10,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728125668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:10,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:10,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:54:10,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850955771] [2024-11-09 10:54:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:10,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:54:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:54:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:54:10,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:10,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 10:54:10,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:10,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:10,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:10,338 INFO L124 PetriNetUnfolderBase]: 238/440 cut-off events. [2024-11-09 10:54:10,338 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:54:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 440 events. 238/440 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2029 event pairs, 201 based on Foata normal form. 22/325 useless extension candidates. Maximal degree in co-relation 808. Up to 388 conditions per place. [2024-11-09 10:54:10,345 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 25 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-09 10:54:10,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 132 flow [2024-11-09 10:54:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:54:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:54:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-11-09 10:54:10,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-09 10:54:10,358 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 57 transitions. [2024-11-09 10:54:10,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 132 flow [2024-11-09 10:54:10,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:10,364 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 74 flow [2024-11-09 10:54:10,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-09 10:54:10,369 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-09 10:54:10,369 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 74 flow [2024-11-09 10:54:10,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 10:54:10,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:10,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:54:10,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:54:10,370 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:10,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash 515661, now seen corresponding path program 1 times [2024-11-09 10:54:10,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:10,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182781469] [2024-11-09 10:54:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:10,683 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 10:54:10,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182781469] [2024-11-09 10:54:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182781469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:10,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:10,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788319323] [2024-11-09 10:54:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:10,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:10,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:10,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:10,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 10:54:10,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:10,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:10,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:10,807 INFO L124 PetriNetUnfolderBase]: 239/443 cut-off events. [2024-11-09 10:54:10,807 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:54:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 443 events. 239/443 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2027 event pairs, 201 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 832. Up to 393 conditions per place. [2024-11-09 10:54:10,812 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-09 10:54:10,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 144 flow [2024-11-09 10:54:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-09 10:54:10,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-09 10:54:10,815 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 74 flow. Second operand 4 states and 68 transitions. [2024-11-09 10:54:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 144 flow [2024-11-09 10:54:10,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:10,817 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 97 flow [2024-11-09 10:54:10,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-09 10:54:10,818 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-09 10:54:10,819 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 97 flow [2024-11-09 10:54:10,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 10:54:10,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:10,819 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:54:10,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:54:10,820 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:10,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 495566162, now seen corresponding path program 1 times [2024-11-09 10:54:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756365093] [2024-11-09 10:54:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:11,085 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 10:54:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756365093] [2024-11-09 10:54:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756365093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728067963] [2024-11-09 10:54:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:11,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:11,093 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 10:54:11,096 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 10:54:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:11,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:54:11,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:11,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:54:11,398 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 10:54:11,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:11,475 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 10:54:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728067963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:11,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:11,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:54:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911086454] [2024-11-09 10:54:11,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:11,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:54:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:54:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:11,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:11,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 10:54:11,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:11,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:11,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:11,879 INFO L124 PetriNetUnfolderBase]: 240/445 cut-off events. [2024-11-09 10:54:11,879 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:54:11,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 445 events. 240/445 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2047 event pairs, 201 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 839. Up to 390 conditions per place. [2024-11-09 10:54:11,882 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-11-09 10:54:11,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 171 flow [2024-11-09 10:54:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-11-09 10:54:11,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.334375 [2024-11-09 10:54:11,883 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 97 flow. Second operand 8 states and 107 transitions. [2024-11-09 10:54:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 171 flow [2024-11-09 10:54:11,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:54:11,884 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 122 flow [2024-11-09 10:54:11,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-09 10:54:11,885 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-11-09 10:54:11,885 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 122 flow [2024-11-09 10:54:11,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 10:54:11,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:11,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:54:11,901 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 10:54:12,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:12,091 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:12,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1815149000, now seen corresponding path program 1 times [2024-11-09 10:54:12,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:12,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762751329] [2024-11-09 10:54:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:12,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:12,163 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 10:54:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762751329] [2024-11-09 10:54:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762751329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:12,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:12,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596177473] [2024-11-09 10:54:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:12,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:12,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:12,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 10:54:12,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:12,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:12,255 INFO L124 PetriNetUnfolderBase]: 169/320 cut-off events. [2024-11-09 10:54:12,255 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:54:12,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 320 events. 169/320 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1276 event pairs, 136 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 597. Up to 273 conditions per place. [2024-11-09 10:54:12,258 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-09 10:54:12,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 176 flow [2024-11-09 10:54:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-09 10:54:12,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-11-09 10:54:12,260 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 122 flow. Second operand 4 states and 63 transitions. [2024-11-09 10:54:12,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 176 flow [2024-11-09 10:54:12,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 134 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:54:12,262 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 82 flow [2024-11-09 10:54:12,262 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-09 10:54:12,263 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:54:12,263 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 82 flow [2024-11-09 10:54:12,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 10:54:12,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:12,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:54:12,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:54:12,264 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:12,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1815148999, now seen corresponding path program 1 times [2024-11-09 10:54:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863233538] [2024-11-09 10:54:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:12,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:12,322 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 10:54:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863233538] [2024-11-09 10:54:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863233538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:12,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:12,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591023914] [2024-11-09 10:54:12,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:12,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:12,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:54:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 10:54:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:54:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:12,434 INFO L124 PetriNetUnfolderBase]: 181/356 cut-off events. [2024-11-09 10:54:12,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:54:12,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 356 events. 181/356 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1445 event pairs, 149 based on Foata normal form. 14/309 useless extension candidates. Maximal degree in co-relation 589. Up to 278 conditions per place. [2024-11-09 10:54:12,437 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 27 selfloop transitions, 2 changer transitions 8/42 dead transitions. [2024-11-09 10:54:12,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 172 flow [2024-11-09 10:54:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-09 10:54:12,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:54:12,443 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 4 states and 80 transitions. [2024-11-09 10:54:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 172 flow [2024-11-09 10:54:12,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:12,444 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 90 flow [2024-11-09 10:54:12,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-09 10:54:12,448 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-09 10:54:12,449 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 90 flow [2024-11-09 10:54:12,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 10:54:12,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:12,449 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:12,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:54:12,450 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:12,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1611599124, now seen corresponding path program 1 times [2024-11-09 10:54:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:12,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520831521] [2024-11-09 10:54:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:12,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:12,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520831521] [2024-11-09 10:54:12,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520831521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:12,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091734916] [2024-11-09 10:54:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:12,657 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 10:54:12,666 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 10:54:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:12,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:54:12,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:12,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:54:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091734916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:12,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:54:12,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-09 10:54:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906755561] [2024-11-09 10:54:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:12,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:54:12,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:54:12,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 10:54:12,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:12,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:54:12,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:12,919 INFO L124 PetriNetUnfolderBase]: 109/214 cut-off events. [2024-11-09 10:54:12,920 INFO L125 PetriNetUnfolderBase]: For 33/36 co-relation queries the response was YES. [2024-11-09 10:54:12,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 214 events. 109/214 cut-off events. For 33/36 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 685 event pairs, 83 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 437. Up to 176 conditions per place. [2024-11-09 10:54:12,922 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-11-09 10:54:12,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 130 flow [2024-11-09 10:54:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-09 10:54:12,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-09 10:54:12,925 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 90 flow. Second operand 4 states and 64 transitions. [2024-11-09 10:54:12,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 130 flow [2024-11-09 10:54:12,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:12,927 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 80 flow [2024-11-09 10:54:12,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-09 10:54:12,929 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-09 10:54:12,929 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 80 flow [2024-11-09 10:54:12,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 10:54:12,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:12,931 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:12,949 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 10:54:13,135 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 10:54:13,136 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:13,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -719122717, now seen corresponding path program 1 times [2024-11-09 10:54:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:13,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104372472] [2024-11-09 10:54:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:13,210 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 10:54:13,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:13,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104372472] [2024-11-09 10:54:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104372472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:13,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284874990] [2024-11-09 10:54:13,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:13,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:54:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:54:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:54:13,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:54:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 10:54:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:54:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:13,284 INFO L124 PetriNetUnfolderBase]: 117/232 cut-off events. [2024-11-09 10:54:13,284 INFO L125 PetriNetUnfolderBase]: For 40/43 co-relation queries the response was YES. [2024-11-09 10:54:13,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 232 events. 117/232 cut-off events. For 40/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 34 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 468. Up to 159 conditions per place. [2024-11-09 10:54:13,286 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 30 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-11-09 10:54:13,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 165 flow [2024-11-09 10:54:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:54:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:54:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-09 10:54:13,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-11-09 10:54:13,287 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 80 flow. Second operand 3 states and 59 transitions. [2024-11-09 10:54:13,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 165 flow [2024-11-09 10:54:13,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:13,290 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 99 flow [2024-11-09 10:54:13,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2024-11-09 10:54:13,291 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:54:13,292 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 99 flow [2024-11-09 10:54:13,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 10:54:13,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:13,293 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:13,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:54:13,293 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:13,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:13,293 INFO L85 PathProgramCache]: Analyzing trace with hash 220299981, now seen corresponding path program 2 times [2024-11-09 10:54:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:13,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994385003] [2024-11-09 10:54:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:13,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:13,741 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 10:54:13,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994385003] [2024-11-09 10:54:13,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994385003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:13,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:13,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:13,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576621208] [2024-11-09 10:54:13,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:13,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:13,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:13,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:13,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 99 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:13,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:13,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:13,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:13,975 INFO L124 PetriNetUnfolderBase]: 172/339 cut-off events. [2024-11-09 10:54:13,976 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-09 10:54:13,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 339 events. 172/339 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1271 event pairs, 10 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 778. Up to 199 conditions per place. [2024-11-09 10:54:13,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 46 selfloop transitions, 14 changer transitions 5/69 dead transitions. [2024-11-09 10:54:13,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 333 flow [2024-11-09 10:54:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-11-09 10:54:13,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3775 [2024-11-09 10:54:13,979 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 99 flow. Second operand 10 states and 151 transitions. [2024-11-09 10:54:13,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 333 flow [2024-11-09 10:54:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 69 transitions, 307 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:13,982 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 162 flow [2024-11-09 10:54:13,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-11-09 10:54:13,983 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-11-09 10:54:13,983 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 162 flow [2024-11-09 10:54:13,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:13,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:13,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:13,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:54:13,984 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:13,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1499283237, now seen corresponding path program 3 times [2024-11-09 10:54:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101242516] [2024-11-09 10:54:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:14,418 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 10:54:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101242516] [2024-11-09 10:54:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101242516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531357042] [2024-11-09 10:54:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:14,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:14,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:14,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 162 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:14,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:14,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:14,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:14,632 INFO L124 PetriNetUnfolderBase]: 194/393 cut-off events. [2024-11-09 10:54:14,633 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2024-11-09 10:54:14,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 393 events. 194/393 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1618 event pairs, 24 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 1059. Up to 226 conditions per place. [2024-11-09 10:54:14,636 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 48 selfloop transitions, 21 changer transitions 5/78 dead transitions. [2024-11-09 10:54:14,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 448 flow [2024-11-09 10:54:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-11-09 10:54:14,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-11-09 10:54:14,637 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 162 flow. Second operand 10 states and 154 transitions. [2024-11-09 10:54:14,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 448 flow [2024-11-09 10:54:14,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 437 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:14,643 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 285 flow [2024-11-09 10:54:14,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-11-09 10:54:14,644 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-11-09 10:54:14,645 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 285 flow [2024-11-09 10:54:14,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:14,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:14,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:14,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:54:14,646 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:14,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1747105657, now seen corresponding path program 4 times [2024-11-09 10:54:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175037523] [2024-11-09 10:54:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:15,040 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 10:54:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175037523] [2024-11-09 10:54:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175037523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:15,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014511221] [2024-11-09 10:54:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:15,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:15,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:15,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:15,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:15,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:15,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:15,316 INFO L124 PetriNetUnfolderBase]: 206/433 cut-off events. [2024-11-09 10:54:15,316 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-11-09 10:54:15,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 433 events. 206/433 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1946 event pairs, 9 based on Foata normal form. 1/434 useless extension candidates. Maximal degree in co-relation 1357. Up to 213 conditions per place. [2024-11-09 10:54:15,319 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 52 selfloop transitions, 27 changer transitions 5/88 dead transitions. [2024-11-09 10:54:15,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 590 flow [2024-11-09 10:54:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:54:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:54:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-11-09 10:54:15,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3795454545454545 [2024-11-09 10:54:15,320 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 285 flow. Second operand 11 states and 167 transitions. [2024-11-09 10:54:15,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 590 flow [2024-11-09 10:54:15,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 566 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:15,323 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 361 flow [2024-11-09 10:54:15,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=361, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-11-09 10:54:15,323 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-11-09 10:54:15,323 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 361 flow [2024-11-09 10:54:15,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:15,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:15,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:15,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:54:15,324 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:15,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1155481859, now seen corresponding path program 5 times [2024-11-09 10:54:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:15,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723329636] [2024-11-09 10:54:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:15,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:15,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:15,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723329636] [2024-11-09 10:54:15,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723329636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:15,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:15,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166532053] [2024-11-09 10:54:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:15,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:15,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:15,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:15,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:15,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:15,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:15,831 INFO L124 PetriNetUnfolderBase]: 205/440 cut-off events. [2024-11-09 10:54:15,831 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2024-11-09 10:54:15,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 440 events. 205/440 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2013 event pairs, 32 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 1498. Up to 263 conditions per place. [2024-11-09 10:54:15,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 53 selfloop transitions, 23 changer transitions 5/85 dead transitions. [2024-11-09 10:54:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 655 flow [2024-11-09 10:54:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-11-09 10:54:15,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-11-09 10:54:15,835 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 361 flow. Second operand 10 states and 153 transitions. [2024-11-09 10:54:15,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 655 flow [2024-11-09 10:54:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 592 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:15,839 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 402 flow [2024-11-09 10:54:15,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=402, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-11-09 10:54:15,839 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-11-09 10:54:15,840 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 402 flow [2024-11-09 10:54:15,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:15,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:15,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:15,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:54:15,840 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:15,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash 528006183, now seen corresponding path program 6 times [2024-11-09 10:54:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:15,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271296334] [2024-11-09 10:54:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:15,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:16,152 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 10:54:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271296334] [2024-11-09 10:54:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271296334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:16,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:16,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863687989] [2024-11-09 10:54:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:16,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:16,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:16,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 402 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:16,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:16,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:16,355 INFO L124 PetriNetUnfolderBase]: 217/474 cut-off events. [2024-11-09 10:54:16,355 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2024-11-09 10:54:16,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 474 events. 217/474 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2265 event pairs, 21 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1627. Up to 282 conditions per place. [2024-11-09 10:54:16,358 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 58 selfloop transitions, 24 changer transitions 5/91 dead transitions. [2024-11-09 10:54:16,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 701 flow [2024-11-09 10:54:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-11-09 10:54:16,360 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-09 10:54:16,360 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 402 flow. Second operand 10 states and 155 transitions. [2024-11-09 10:54:16,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 701 flow [2024-11-09 10:54:16,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 657 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-09 10:54:16,363 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 447 flow [2024-11-09 10:54:16,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=447, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-11-09 10:54:16,364 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 38 predicate places. [2024-11-09 10:54:16,364 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 447 flow [2024-11-09 10:54:16,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:16,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:16,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:16,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:54:16,364 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:16,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -829425351, now seen corresponding path program 7 times [2024-11-09 10:54:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:16,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883893640] [2024-11-09 10:54:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:16,580 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 10:54:16,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:16,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883893640] [2024-11-09 10:54:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883893640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:16,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:16,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:16,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830896875] [2024-11-09 10:54:16,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:16,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:16,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:16,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:16,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 447 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:16,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:16,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:16,800 INFO L124 PetriNetUnfolderBase]: 213/461 cut-off events. [2024-11-09 10:54:16,800 INFO L125 PetriNetUnfolderBase]: For 1505/1513 co-relation queries the response was YES. [2024-11-09 10:54:16,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 461 events. 213/461 cut-off events. For 1505/1513 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2167 event pairs, 22 based on Foata normal form. 9/470 useless extension candidates. Maximal degree in co-relation 1705. Up to 286 conditions per place. [2024-11-09 10:54:16,803 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 52 selfloop transitions, 23 changer transitions 8/87 dead transitions. [2024-11-09 10:54:16,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 716 flow [2024-11-09 10:54:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-11-09 10:54:16,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-09 10:54:16,808 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 447 flow. Second operand 10 states and 150 transitions. [2024-11-09 10:54:16,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 716 flow [2024-11-09 10:54:16,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 657 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-09 10:54:16,812 INFO L231 Difference]: Finished difference. Result has 81 places, 64 transitions, 443 flow [2024-11-09 10:54:16,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=443, PETRI_PLACES=81, PETRI_TRANSITIONS=64} [2024-11-09 10:54:16,812 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-11-09 10:54:16,813 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 64 transitions, 443 flow [2024-11-09 10:54:16,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:16,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:16,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:16,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:54:16,813 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:16,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1985813381, now seen corresponding path program 8 times [2024-11-09 10:54:16,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:16,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909758375] [2024-11-09 10:54:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:16,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:17,090 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 10:54:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:17,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909758375] [2024-11-09 10:54:17,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909758375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:17,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:17,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120296554] [2024-11-09 10:54:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:17,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:17,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:17,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 64 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:17,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:17,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:17,258 INFO L124 PetriNetUnfolderBase]: 222/486 cut-off events. [2024-11-09 10:54:17,258 INFO L125 PetriNetUnfolderBase]: For 1660/1672 co-relation queries the response was YES. [2024-11-09 10:54:17,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 486 events. 222/486 cut-off events. For 1660/1672 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2317 event pairs, 42 based on Foata normal form. 3/489 useless extension candidates. Maximal degree in co-relation 1796. Up to 292 conditions per place. [2024-11-09 10:54:17,262 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 61 selfloop transitions, 24 changer transitions 5/94 dead transitions. [2024-11-09 10:54:17,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 791 flow [2024-11-09 10:54:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-11-09 10:54:17,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3925 [2024-11-09 10:54:17,264 INFO L175 Difference]: Start difference. First operand has 81 places, 64 transitions, 443 flow. Second operand 10 states and 157 transitions. [2024-11-09 10:54:17,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 791 flow [2024-11-09 10:54:17,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 735 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-09 10:54:17,269 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 486 flow [2024-11-09 10:54:17,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=486, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2024-11-09 10:54:17,270 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-11-09 10:54:17,270 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 486 flow [2024-11-09 10:54:17,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:17,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:17,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:17,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:54:17,271 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:17,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1146305349, now seen corresponding path program 9 times [2024-11-09 10:54:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90592812] [2024-11-09 10:54:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:17,495 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 10:54:17,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:17,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90592812] [2024-11-09 10:54:17,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90592812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:17,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:17,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:17,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611625700] [2024-11-09 10:54:17,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:17,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:17,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:17,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 486 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:17,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:17,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:17,673 INFO L124 PetriNetUnfolderBase]: 218/475 cut-off events. [2024-11-09 10:54:17,674 INFO L125 PetriNetUnfolderBase]: For 2271/2291 co-relation queries the response was YES. [2024-11-09 10:54:17,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 475 events. 218/475 cut-off events. For 2271/2291 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2273 event pairs, 33 based on Foata normal form. 11/486 useless extension candidates. Maximal degree in co-relation 1866. Up to 296 conditions per place. [2024-11-09 10:54:17,677 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 23 changer transitions 8/90 dead transitions. [2024-11-09 10:54:17,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 796 flow [2024-11-09 10:54:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-11-09 10:54:17,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-09 10:54:17,679 INFO L175 Difference]: Start difference. First operand has 83 places, 67 transitions, 486 flow. Second operand 10 states and 152 transitions. [2024-11-09 10:54:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 796 flow [2024-11-09 10:54:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 727 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-09 10:54:17,684 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 474 flow [2024-11-09 10:54:17,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2024-11-09 10:54:17,684 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-11-09 10:54:17,685 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 474 flow [2024-11-09 10:54:17,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:17,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:17,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:17,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:54:17,685 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:17,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1965352537, now seen corresponding path program 10 times [2024-11-09 10:54:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:17,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307175002] [2024-11-09 10:54:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:17,924 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 10:54:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307175002] [2024-11-09 10:54:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307175002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790849450] [2024-11-09 10:54:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:17,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:17,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:17,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:17,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:17,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:18,152 INFO L124 PetriNetUnfolderBase]: 230/504 cut-off events. [2024-11-09 10:54:18,153 INFO L125 PetriNetUnfolderBase]: For 2507/2531 co-relation queries the response was YES. [2024-11-09 10:54:18,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 504 events. 230/504 cut-off events. For 2507/2531 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2416 event pairs, 39 based on Foata normal form. 5/508 useless extension candidates. Maximal degree in co-relation 1969. Up to 302 conditions per place. [2024-11-09 10:54:18,156 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 23 changer transitions 5/96 dead transitions. [2024-11-09 10:54:18,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 845 flow [2024-11-09 10:54:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-11-09 10:54:18,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-11-09 10:54:18,160 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 474 flow. Second operand 10 states and 158 transitions. [2024-11-09 10:54:18,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 845 flow [2024-11-09 10:54:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 787 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:54:18,167 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 523 flow [2024-11-09 10:54:18,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=523, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2024-11-09 10:54:18,168 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-11-09 10:54:18,168 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 523 flow [2024-11-09 10:54:18,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:18,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:18,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:18,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:54:18,168 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:18,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1187406449, now seen corresponding path program 11 times [2024-11-09 10:54:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:18,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780544066] [2024-11-09 10:54:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,437 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 10:54:18,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:18,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780544066] [2024-11-09 10:54:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780544066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:18,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:18,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:54:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117767747] [2024-11-09 10:54:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:18,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:54:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:54:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:18,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-09 10:54:18,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 523 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:18,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:18,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-09 10:54:18,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:18,612 INFO L124 PetriNetUnfolderBase]: 226/491 cut-off events. [2024-11-09 10:54:18,612 INFO L125 PetriNetUnfolderBase]: For 3345/3383 co-relation queries the response was YES. [2024-11-09 10:54:18,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 491 events. 226/491 cut-off events. For 3345/3383 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2332 event pairs, 39 based on Foata normal form. 13/503 useless extension candidates. Maximal degree in co-relation 2025. Up to 306 conditions per place. [2024-11-09 10:54:18,616 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 58 selfloop transitions, 22 changer transitions 8/92 dead transitions. [2024-11-09 10:54:18,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 840 flow [2024-11-09 10:54:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:54:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:54:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-11-09 10:54:18,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-11-09 10:54:18,617 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 523 flow. Second operand 10 states and 153 transitions. [2024-11-09 10:54:18,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 840 flow [2024-11-09 10:54:18,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 763 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-11-09 10:54:18,622 INFO L231 Difference]: Finished difference. Result has 91 places, 70 transitions, 503 flow [2024-11-09 10:54:18,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=503, PETRI_PLACES=91, PETRI_TRANSITIONS=70} [2024-11-09 10:54:18,623 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-11-09 10:54:18,623 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 70 transitions, 503 flow [2024-11-09 10:54:18,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 10:54:18,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:18,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:18,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:54:18,623 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:18,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1831596706, now seen corresponding path program 1 times [2024-11-09 10:54:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:18,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942134646] [2024-11-09 10:54:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,700 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 10:54:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942134646] [2024-11-09 10:54:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942134646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646450413] [2024-11-09 10:54:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:18,706 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 10:54:18,708 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 10:54:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:18,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:18,854 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 10:54:18,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:18,936 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 10:54:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646450413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:18,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-09 10:54:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032034690] [2024-11-09 10:54:18,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:18,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:18,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:18,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:54:18,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 70 transitions, 503 flow. Second operand has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 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 10:54:18,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:18,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:54:18,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:19,249 INFO L124 PetriNetUnfolderBase]: 359/859 cut-off events. [2024-11-09 10:54:19,250 INFO L125 PetriNetUnfolderBase]: For 6495/6545 co-relation queries the response was YES. [2024-11-09 10:54:19,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 859 events. 359/859 cut-off events. For 6495/6545 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5101 event pairs, 148 based on Foata normal form. 38/896 useless extension candidates. Maximal degree in co-relation 3581. Up to 369 conditions per place. [2024-11-09 10:54:19,256 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 112 selfloop transitions, 8 changer transitions 13/138 dead transitions. [2024-11-09 10:54:19,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 1314 flow [2024-11-09 10:54:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-11-09 10:54:19,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-11-09 10:54:19,261 INFO L175 Difference]: Start difference. First operand has 91 places, 70 transitions, 503 flow. Second operand 8 states and 138 transitions. [2024-11-09 10:54:19,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 1314 flow [2024-11-09 10:54:19,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1194 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-09 10:54:19,273 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 508 flow [2024-11-09 10:54:19,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-11-09 10:54:19,274 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-11-09 10:54:19,274 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 508 flow [2024-11-09 10:54:19,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 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 10:54:19,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:19,274 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:19,290 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 10:54:19,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:54:19,478 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:19,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1817878605, now seen corresponding path program 1 times [2024-11-09 10:54:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826797655] [2024-11-09 10:54:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826797655] [2024-11-09 10:54:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826797655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:54:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570897624] [2024-11-09 10:54:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:19,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:19,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:54:19,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 508 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 10:54:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:54:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:19,696 INFO L124 PetriNetUnfolderBase]: 341/861 cut-off events. [2024-11-09 10:54:19,696 INFO L125 PetriNetUnfolderBase]: For 7837/7949 co-relation queries the response was YES. [2024-11-09 10:54:19,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 861 events. 341/861 cut-off events. For 7837/7949 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5122 event pairs, 98 based on Foata normal form. 83/943 useless extension candidates. Maximal degree in co-relation 3530. Up to 322 conditions per place. [2024-11-09 10:54:19,707 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 58 selfloop transitions, 7 changer transitions 27/97 dead transitions. [2024-11-09 10:54:19,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 852 flow [2024-11-09 10:54:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-09 10:54:19,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-11-09 10:54:19,708 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 508 flow. Second operand 4 states and 91 transitions. [2024-11-09 10:54:19,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 852 flow [2024-11-09 10:54:19,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 807 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:19,719 INFO L231 Difference]: Finished difference. Result has 90 places, 44 transitions, 308 flow [2024-11-09 10:54:19,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=90, PETRI_TRANSITIONS=44} [2024-11-09 10:54:19,719 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2024-11-09 10:54:19,720 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 44 transitions, 308 flow [2024-11-09 10:54:19,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 10:54:19,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:19,723 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:19,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:54:19,723 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:19,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1362151489, now seen corresponding path program 2 times [2024-11-09 10:54:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:19,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020134574] [2024-11-09 10:54:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020134574] [2024-11-09 10:54:20,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020134574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118932410] [2024-11-09 10:54:20,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:20,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:20,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:20,195 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 10:54:20,199 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 10:54:20,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:20,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:20,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:54:20,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:20,625 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:54:20,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-09 10:54:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:20,742 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:54:20,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-09 10:54:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118932410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:20,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-09 10:54:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708636333] [2024-11-09 10:54:20,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:20,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:54:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:54:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:54:20,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-09 10:54:20,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 44 transitions, 308 flow. Second operand has 22 states, 22 states have (on average 10.863636363636363) internal successors, (239), 22 states have internal predecessors, (239), 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 10:54:20,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:20,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-09 10:54:20,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:22,079 INFO L124 PetriNetUnfolderBase]: 945/1811 cut-off events. [2024-11-09 10:54:22,079 INFO L125 PetriNetUnfolderBase]: For 18411/18411 co-relation queries the response was YES. [2024-11-09 10:54:22,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8014 conditions, 1811 events. 945/1811 cut-off events. For 18411/18411 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10079 event pairs, 160 based on Foata normal form. 39/1849 useless extension candidates. Maximal degree in co-relation 7781. Up to 396 conditions per place. [2024-11-09 10:54:22,092 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 42 changer transitions 0/201 dead transitions. [2024-11-09 10:54:22,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 201 transitions, 1907 flow [2024-11-09 10:54:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 10:54:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-09 10:54:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 307 transitions. [2024-11-09 10:54:22,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4263888888888889 [2024-11-09 10:54:22,096 INFO L175 Difference]: Start difference. First operand has 90 places, 44 transitions, 308 flow. Second operand 18 states and 307 transitions. [2024-11-09 10:54:22,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 201 transitions, 1907 flow [2024-11-09 10:54:22,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 201 transitions, 1364 flow, removed 257 selfloop flow, removed 17 redundant places. [2024-11-09 10:54:22,106 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 655 flow [2024-11-09 10:54:22,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=655, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-11-09 10:54:22,107 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-11-09 10:54:22,107 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 655 flow [2024-11-09 10:54:22,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.863636363636363) internal successors, (239), 22 states have internal predecessors, (239), 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 10:54:22,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:22,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:22,120 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 10:54:22,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:22,308 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:22,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2145393365, now seen corresponding path program 3 times [2024-11-09 10:54:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966967143] [2024-11-09 10:54:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966967143] [2024-11-09 10:54:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966967143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100359421] [2024-11-09 10:54:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:54:22,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:22,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:22,559 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 10:54:22,561 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 10:54:22,637 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:54:22,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:22,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:54:22,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:22,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:22,732 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:54:22,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-09 10:54:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100359421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:22,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2024-11-09 10:54:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141907520] [2024-11-09 10:54:22,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:22,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:22,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-09 10:54:22,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 655 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 10:54:22,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:22,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-09 10:54:22,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:23,519 INFO L124 PetriNetUnfolderBase]: 1314/2521 cut-off events. [2024-11-09 10:54:23,519 INFO L125 PetriNetUnfolderBase]: For 10652/10652 co-relation queries the response was YES. [2024-11-09 10:54:23,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9613 conditions, 2521 events. 1314/2521 cut-off events. For 10652/10652 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14463 event pairs, 257 based on Foata normal form. 56/2576 useless extension candidates. Maximal degree in co-relation 7824. Up to 1031 conditions per place. [2024-11-09 10:54:23,581 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 131 selfloop transitions, 34 changer transitions 0/168 dead transitions. [2024-11-09 10:54:23,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 168 transitions, 1641 flow [2024-11-09 10:54:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:54:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:54:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-11-09 10:54:23,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3795454545454545 [2024-11-09 10:54:23,587 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 655 flow. Second operand 11 states and 167 transitions. [2024-11-09 10:54:23,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 168 transitions, 1641 flow [2024-11-09 10:54:23,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 168 transitions, 1503 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:23,624 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 795 flow [2024-11-09 10:54:23,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=795, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-11-09 10:54:23,625 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-11-09 10:54:23,625 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 795 flow [2024-11-09 10:54:23,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 10:54:23,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:23,630 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:23,665 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 10:54:23,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:23,832 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:23,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 175854733, now seen corresponding path program 1 times [2024-11-09 10:54:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:23,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408484724] [2024-11-09 10:54:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:23,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:24,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408484724] [2024-11-09 10:54:24,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408484724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844041999] [2024-11-09 10:54:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:24,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:24,764 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 10:54:24,765 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 10:54:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:24,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 10:54:24,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:25,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:25,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:25,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2024-11-09 10:54:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844041999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:26,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-09 10:54:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081488871] [2024-11-09 10:54:26,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:26,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 10:54:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 10:54:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2394, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 10:54:26,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:54:26,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 795 flow. Second operand has 52 states, 52 states have (on average 8.615384615384615) internal successors, (448), 52 states have internal predecessors, (448), 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 10:54:26,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:26,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:54:26,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:31,415 INFO L124 PetriNetUnfolderBase]: 2447/4577 cut-off events. [2024-11-09 10:54:31,415 INFO L125 PetriNetUnfolderBase]: For 20969/20969 co-relation queries the response was YES. [2024-11-09 10:54:31,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 4577 events. 2447/4577 cut-off events. For 20969/20969 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 29398 event pairs, 323 based on Foata normal form. 3/4580 useless extension candidates. Maximal degree in co-relation 13675. Up to 2555 conditions per place. [2024-11-09 10:54:31,466 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 195 selfloop transitions, 190 changer transitions 10/397 dead transitions. [2024-11-09 10:54:31,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 397 transitions, 3774 flow [2024-11-09 10:54:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 10:54:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-09 10:54:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 589 transitions. [2024-11-09 10:54:31,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2887254901960784 [2024-11-09 10:54:31,471 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 795 flow. Second operand 51 states and 589 transitions. [2024-11-09 10:54:31,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 397 transitions, 3774 flow [2024-11-09 10:54:31,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 397 transitions, 3745 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:31,506 INFO L231 Difference]: Finished difference. Result has 145 places, 272 transitions, 3097 flow [2024-11-09 10:54:31,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3097, PETRI_PLACES=145, PETRI_TRANSITIONS=272} [2024-11-09 10:54:31,507 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 105 predicate places. [2024-11-09 10:54:31,507 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 272 transitions, 3097 flow [2024-11-09 10:54:31,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 8.615384615384615) internal successors, (448), 52 states have internal predecessors, (448), 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 10:54:31,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:31,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:31,524 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 10:54:31,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:31,712 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:31,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -71684467, now seen corresponding path program 2 times [2024-11-09 10:54:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:31,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800792863] [2024-11-09 10:54:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:32,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800792863] [2024-11-09 10:54:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800792863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:32,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682325054] [2024-11-09 10:54:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:32,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:32,421 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 10:54:32,422 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 10:54:32,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:32,482 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:32,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 10:54:32,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:33,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:33,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:33,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-09 10:54:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682325054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:34,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2024-11-09 10:54:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760105703] [2024-11-09 10:54:34,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:34,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 10:54:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 10:54:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2146, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 10:54:34,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:54:34,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 272 transitions, 3097 flow. Second operand has 49 states, 49 states have (on average 8.693877551020408) internal successors, (426), 49 states have internal predecessors, (426), 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 10:54:34,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:34,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:54:34,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:39,500 INFO L124 PetriNetUnfolderBase]: 2786/5261 cut-off events. [2024-11-09 10:54:39,500 INFO L125 PetriNetUnfolderBase]: For 37512/37512 co-relation queries the response was YES. [2024-11-09 10:54:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25854 conditions, 5261 events. 2786/5261 cut-off events. For 37512/37512 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 35339 event pairs, 237 based on Foata normal form. 5/5266 useless extension candidates. Maximal degree in co-relation 25781. Up to 2626 conditions per place. [2024-11-09 10:54:39,543 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 266 selfloop transitions, 302 changer transitions 29/599 dead transitions. [2024-11-09 10:54:39,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 599 transitions, 6770 flow [2024-11-09 10:54:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 10:54:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-09 10:54:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 689 transitions. [2024-11-09 10:54:39,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30758928571428573 [2024-11-09 10:54:39,551 INFO L175 Difference]: Start difference. First operand has 145 places, 272 transitions, 3097 flow. Second operand 56 states and 689 transitions. [2024-11-09 10:54:39,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 599 transitions, 6770 flow [2024-11-09 10:54:39,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 599 transitions, 6575 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:39,640 INFO L231 Difference]: Finished difference. Result has 212 places, 413 transitions, 5503 flow [2024-11-09 10:54:39,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=5503, PETRI_PLACES=212, PETRI_TRANSITIONS=413} [2024-11-09 10:54:39,641 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 172 predicate places. [2024-11-09 10:54:39,641 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 413 transitions, 5503 flow [2024-11-09 10:54:39,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 8.693877551020408) internal successors, (426), 49 states have internal predecessors, (426), 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 10:54:39,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:39,641 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:39,655 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 10:54:39,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:39,842 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:39,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1735716723, now seen corresponding path program 3 times [2024-11-09 10:54:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:39,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533252190] [2024-11-09 10:54:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533252190] [2024-11-09 10:54:40,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533252190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:40,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936243600] [2024-11-09 10:54:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:54:40,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:40,731 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 10:54:40,732 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 10:54:40,842 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:54:40,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:40,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 10:54:40,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:41,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:41,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:41,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-09 10:54:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936243600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:42,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 41 [2024-11-09 10:54:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179679859] [2024-11-09 10:54:42,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:42,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 10:54:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 10:54:42,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 10:54:42,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:54:42,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 413 transitions, 5503 flow. Second operand has 42 states, 42 states have (on average 8.904761904761905) internal successors, (374), 42 states have internal predecessors, (374), 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 10:54:42,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:42,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:54:42,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:44,415 INFO L124 PetriNetUnfolderBase]: 2860/5394 cut-off events. [2024-11-09 10:54:44,419 INFO L125 PetriNetUnfolderBase]: For 58393/58393 co-relation queries the response was YES. [2024-11-09 10:54:44,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31743 conditions, 5394 events. 2860/5394 cut-off events. For 58393/58393 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 36294 event pairs, 268 based on Foata normal form. 2/5396 useless extension candidates. Maximal degree in co-relation 31652. Up to 3068 conditions per place. [2024-11-09 10:54:44,509 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 295 selfloop transitions, 300 changer transitions 5/602 dead transitions. [2024-11-09 10:54:44,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 602 transitions, 8385 flow [2024-11-09 10:54:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:54:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:54:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 415 transitions. [2024-11-09 10:54:44,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2024-11-09 10:54:44,515 INFO L175 Difference]: Start difference. First operand has 212 places, 413 transitions, 5503 flow. Second operand 33 states and 415 transitions. [2024-11-09 10:54:44,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 602 transitions, 8385 flow [2024-11-09 10:54:44,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 602 transitions, 7984 flow, removed 192 selfloop flow, removed 8 redundant places. [2024-11-09 10:54:44,725 INFO L231 Difference]: Finished difference. Result has 242 places, 490 transitions, 7218 flow [2024-11-09 10:54:44,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5166, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7218, PETRI_PLACES=242, PETRI_TRANSITIONS=490} [2024-11-09 10:54:44,726 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 202 predicate places. [2024-11-09 10:54:44,726 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 490 transitions, 7218 flow [2024-11-09 10:54:44,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.904761904761905) internal successors, (374), 42 states have internal predecessors, (374), 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 10:54:44,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:44,726 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:44,739 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 10:54:44,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 10:54:44,931 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:44,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1738699695, now seen corresponding path program 4 times [2024-11-09 10:54:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281914353] [2024-11-09 10:54:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281914353] [2024-11-09 10:54:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281914353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968653960] [2024-11-09 10:54:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:54:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:45,872 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 10:54:45,873 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 10:54:45,987 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:54:45,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:45,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 10:54:45,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:46,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:47,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:47,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-09 10:54:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968653960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:47,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 49 [2024-11-09 10:54:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777762443] [2024-11-09 10:54:47,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:47,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 10:54:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 10:54:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 10:54:47,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:54:47,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 490 transitions, 7218 flow. Second operand has 50 states, 50 states have (on average 8.66) internal successors, (433), 50 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:47,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:47,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:54:47,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:53,550 INFO L124 PetriNetUnfolderBase]: 2918/5561 cut-off events. [2024-11-09 10:54:53,550 INFO L125 PetriNetUnfolderBase]: For 75470/75470 co-relation queries the response was YES. [2024-11-09 10:54:53,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35743 conditions, 5561 events. 2918/5561 cut-off events. For 75470/75470 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 38154 event pairs, 231 based on Foata normal form. 3/5564 useless extension candidates. Maximal degree in co-relation 35652. Up to 2847 conditions per place. [2024-11-09 10:54:53,601 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 282 selfloop transitions, 382 changer transitions 10/676 dead transitions. [2024-11-09 10:54:53,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 676 transitions, 9888 flow [2024-11-09 10:54:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 10:54:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-09 10:54:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 604 transitions. [2024-11-09 10:54:53,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3145833333333333 [2024-11-09 10:54:53,607 INFO L175 Difference]: Start difference. First operand has 242 places, 490 transitions, 7218 flow. Second operand 48 states and 604 transitions. [2024-11-09 10:54:53,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 676 transitions, 9888 flow [2024-11-09 10:54:53,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 676 transitions, 9598 flow, removed 105 selfloop flow, removed 13 redundant places. [2024-11-09 10:54:53,882 INFO L231 Difference]: Finished difference. Result has 283 places, 515 transitions, 8494 flow [2024-11-09 10:54:53,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6978, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8494, PETRI_PLACES=283, PETRI_TRANSITIONS=515} [2024-11-09 10:54:53,883 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-11-09 10:54:53,883 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 515 transitions, 8494 flow [2024-11-09 10:54:53,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.66) internal successors, (433), 50 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:53,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:53,883 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:53,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:54:54,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 10:54:54,085 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:54:54,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash -768498885, now seen corresponding path program 5 times [2024-11-09 10:54:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:54,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115885386] [2024-11-09 10:54:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:54,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:54,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115885386] [2024-11-09 10:54:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115885386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492765634] [2024-11-09 10:54:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:54:54,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:54,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:54,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:54:54,926 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:54:54,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:54,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 10:54:54,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:55,719 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-09 10:54:55,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-11-09 10:54:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:55,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:56,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:56,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-09 10:54:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:57,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492765634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:57,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:57,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 49 [2024-11-09 10:54:57,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345955960] [2024-11-09 10:54:57,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:57,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 10:54:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 10:54:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 10:54:57,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:54:57,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 515 transitions, 8494 flow. Second operand has 50 states, 50 states have (on average 8.68) internal successors, (434), 50 states have internal predecessors, (434), 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 10:54:57,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:57,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:54:57,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:02,126 INFO L124 PetriNetUnfolderBase]: 3009/5762 cut-off events. [2024-11-09 10:55:02,127 INFO L125 PetriNetUnfolderBase]: For 98757/98757 co-relation queries the response was YES. [2024-11-09 10:55:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40031 conditions, 5762 events. 3009/5762 cut-off events. For 98757/98757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 40122 event pairs, 261 based on Foata normal form. 3/5765 useless extension candidates. Maximal degree in co-relation 39928. Up to 2959 conditions per place. [2024-11-09 10:55:02,241 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 274 selfloop transitions, 420 changer transitions 10/706 dead transitions. [2024-11-09 10:55:02,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 706 transitions, 11439 flow [2024-11-09 10:55:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 10:55:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-09 10:55:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 560 transitions. [2024-11-09 10:55:02,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3111111111111111 [2024-11-09 10:55:02,244 INFO L175 Difference]: Start difference. First operand has 283 places, 515 transitions, 8494 flow. Second operand 45 states and 560 transitions. [2024-11-09 10:55:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 706 transitions, 11439 flow [2024-11-09 10:55:02,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 706 transitions, 10935 flow, removed 66 selfloop flow, removed 28 redundant places. [2024-11-09 10:55:02,579 INFO L231 Difference]: Finished difference. Result has 307 places, 555 transitions, 10086 flow [2024-11-09 10:55:02,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8009, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10086, PETRI_PLACES=307, PETRI_TRANSITIONS=555} [2024-11-09 10:55:02,580 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 267 predicate places. [2024-11-09 10:55:02,580 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 555 transitions, 10086 flow [2024-11-09 10:55:02,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.68) internal successors, (434), 50 states have internal predecessors, (434), 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 10:55:02,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:02,580 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:02,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:02,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 10:55:02,784 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:02,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -401089923, now seen corresponding path program 6 times [2024-11-09 10:55:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:02,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230133135] [2024-11-09 10:55:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:03,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:03,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230133135] [2024-11-09 10:55:03,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230133135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:03,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555443485] [2024-11-09 10:55:03,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:55:03,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:03,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:03,767 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:55:03,915 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:55:03,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:03,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 10:55:03,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:04,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-09 10:55:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:04,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:05,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:05,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2024-11-09 10:55:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:05,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555443485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:05,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:05,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-11-09 10:55:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706978770] [2024-11-09 10:55:05,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:05,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 10:55:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 10:55:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 10:55:05,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:55:05,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 555 transitions, 10086 flow. Second operand has 50 states, 50 states have (on average 8.68) internal successors, (434), 50 states have internal predecessors, (434), 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 10:55:05,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:05,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:55:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:14,813 INFO L124 PetriNetUnfolderBase]: 3562/6923 cut-off events. [2024-11-09 10:55:14,814 INFO L125 PetriNetUnfolderBase]: For 151552/151552 co-relation queries the response was YES. [2024-11-09 10:55:14,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52898 conditions, 6923 events. 3562/6923 cut-off events. For 151552/151552 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 50846 event pairs, 292 based on Foata normal form. 9/6932 useless extension candidates. Maximal degree in co-relation 52752. Up to 2759 conditions per place. [2024-11-09 10:55:14,896 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 453 selfloop transitions, 517 changer transitions 33/1005 dead transitions. [2024-11-09 10:55:14,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1005 transitions, 17903 flow [2024-11-09 10:55:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-09 10:55:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2024-11-09 10:55:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 984 transitions. [2024-11-09 10:55:14,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3075 [2024-11-09 10:55:14,900 INFO L175 Difference]: Start difference. First operand has 307 places, 555 transitions, 10086 flow. Second operand 80 states and 984 transitions. [2024-11-09 10:55:14,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1005 transitions, 17903 flow [2024-11-09 10:55:15,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1005 transitions, 17580 flow, removed 79 selfloop flow, removed 22 redundant places. [2024-11-09 10:55:15,428 INFO L231 Difference]: Finished difference. Result has 393 places, 748 transitions, 15228 flow [2024-11-09 10:55:15,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9789, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=15228, PETRI_PLACES=393, PETRI_TRANSITIONS=748} [2024-11-09 10:55:15,429 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 353 predicate places. [2024-11-09 10:55:15,429 INFO L471 AbstractCegarLoop]: Abstraction has has 393 places, 748 transitions, 15228 flow [2024-11-09 10:55:15,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.68) internal successors, (434), 50 states have internal predecessors, (434), 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 10:55:15,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:15,430 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:15,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:55:15,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:55:15,634 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:15,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1240597955, now seen corresponding path program 7 times [2024-11-09 10:55:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:15,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878868940] [2024-11-09 10:55:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878868940] [2024-11-09 10:55:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878868940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095123307] [2024-11-09 10:55:16,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:55:16,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:16,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:16,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:55:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:16,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 10:55:16,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:16,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:17,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:17,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2024-11-09 10:55:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095123307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:17,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 48 [2024-11-09 10:55:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810411759] [2024-11-09 10:55:17,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:17,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 10:55:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 10:55:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 10:55:18,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:55:18,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 748 transitions, 15228 flow. Second operand has 49 states, 49 states have (on average 8.714285714285714) internal successors, (427), 49 states have internal predecessors, (427), 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 10:55:18,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:18,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:55:18,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:26,255 INFO L124 PetriNetUnfolderBase]: 3561/6911 cut-off events. [2024-11-09 10:55:26,255 INFO L125 PetriNetUnfolderBase]: For 216172/216172 co-relation queries the response was YES. [2024-11-09 10:55:26,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59963 conditions, 6911 events. 3561/6911 cut-off events. For 216172/216172 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 50749 event pairs, 268 based on Foata normal form. 4/6915 useless extension candidates. Maximal degree in co-relation 59774. Up to 3618 conditions per place. [2024-11-09 10:55:26,335 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 376 selfloop transitions, 524 changer transitions 31/933 dead transitions. [2024-11-09 10:55:26,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 933 transitions, 18622 flow [2024-11-09 10:55:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 10:55:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-09 10:55:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 685 transitions. [2024-11-09 10:55:26,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30580357142857145 [2024-11-09 10:55:26,337 INFO L175 Difference]: Start difference. First operand has 393 places, 748 transitions, 15228 flow. Second operand 56 states and 685 transitions. [2024-11-09 10:55:26,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 933 transitions, 18622 flow [2024-11-09 10:55:27,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 933 transitions, 17769 flow, removed 352 selfloop flow, removed 26 redundant places. [2024-11-09 10:55:27,512 INFO L231 Difference]: Finished difference. Result has 423 places, 753 transitions, 16155 flow [2024-11-09 10:55:27,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14456, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=16155, PETRI_PLACES=423, PETRI_TRANSITIONS=753} [2024-11-09 10:55:27,514 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 383 predicate places. [2024-11-09 10:55:27,514 INFO L471 AbstractCegarLoop]: Abstraction has has 423 places, 753 transitions, 16155 flow [2024-11-09 10:55:27,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 8.714285714285714) internal successors, (427), 49 states have internal predecessors, (427), 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 10:55:27,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:27,515 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:27,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:55:27,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:55:27,719 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:55:27,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1767177749, now seen corresponding path program 8 times [2024-11-09 10:55:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697072263] [2024-11-09 10:55:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697072263] [2024-11-09 10:55:28,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697072263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:28,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028966409] [2024-11-09 10:55:28,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:55:28,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:28,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:28,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:55:28,788 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:55:28,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:28,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 10:55:28,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:29,431 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:55:29,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:29,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2024-11-09 10:55:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:29,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:30,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:30,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-09 10:55:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028966409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:30,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:30,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2024-11-09 10:55:30,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705253909] [2024-11-09 10:55:30,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:30,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 10:55:30,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 10:55:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 10:55:31,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-09 10:55:31,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 753 transitions, 16155 flow. Second operand has 53 states, 53 states have (on average 8.584905660377359) internal successors, (455), 53 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:31,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:31,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-09 10:55:31,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand