./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:22:05,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:22:06,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:22:06,059 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:22:06,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:22:06,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:22:06,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:22:06,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:22:06,095 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:22:06,096 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:22:06,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:22:06,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:22:06,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:22:06,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:22:06,098 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:22:06,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:22:06,101 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:22:06,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:22:06,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:22:06,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:22:06,102 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:22:06,105 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:22:06,106 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:22:06,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:22:06,106 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:22:06,106 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:22:06,106 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:22:06,107 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:22:06,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:22:06,107 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:22:06,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:22:06,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:22:06,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:22:06,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:06,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:22:06,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:22:06,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:22:06,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:22:06,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:22:06,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:22:06,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:22:06,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:22:06,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-10 18:22:06,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:22:06,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:22:06,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:22:06,413 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:22:06,413 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:22:06,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-10 18:22:08,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:22:08,400 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:22:08,401 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-10 18:22:08,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f4b1c55/21c8d7cbdc014416b4298459e9a0fead/FLAGdc3178477 [2024-11-10 18:22:08,735 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f4b1c55/21c8d7cbdc014416b4298459e9a0fead [2024-11-10 18:22:08,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:22:08,739 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:22:08,740 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:08,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:22:08,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:22:08,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:08" (1/1) ... [2024-11-10 18:22:08,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f8f0ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:08, skipping insertion in model container [2024-11-10 18:22:08,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:22:08" (1/1) ... [2024-11-10 18:22:08,776 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:22:08,987 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:22:08,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:08,999 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:22:09,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:22:09,048 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:22:09,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09 WrapperNode [2024-11-10 18:22:09,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:22:09,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:09,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:22:09,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:22:09,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,106 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 148 [2024-11-10 18:22:09,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:22:09,107 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:22:09,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:22:09,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:22:09,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,145 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]. [2024-11-10 18:22:09,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,152 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,155 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:22:09,160 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:22:09,160 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:22:09,160 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:22:09,161 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (1/1) ... [2024-11-10 18:22:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:22:09,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:09,201 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) [2024-11-10 18:22:09,205 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 [2024-11-10 18:22:09,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:22:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:22:09,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:22:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:22:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:22:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:22:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:22:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:22:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:22:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:22:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:22:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:22:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:22:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:22:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:22:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:22:09,267 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:22:09,389 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:22:09,392 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:22:09,767 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:22:09,768 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:22:10,043 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:22:10,043 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:22:10,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:10 BoogieIcfgContainer [2024-11-10 18:22:10,044 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:22:10,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:22:10,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:22:10,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:22:10,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:22:08" (1/3) ... [2024-11-10 18:22:10,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ca67fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:10, skipping insertion in model container [2024-11-10 18:22:10,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:22:09" (2/3) ... [2024-11-10 18:22:10,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ca67fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:22:10, skipping insertion in model container [2024-11-10 18:22:10,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:22:10" (3/3) ... [2024-11-10 18:22:10,058 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-10 18:22:10,078 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:22:10,078 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-10 18:22:10,078 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:22:10,137 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:22:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 48 transitions, 110 flow [2024-11-10 18:22:10,225 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-11-10 18:22:10,226 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 18:22:10,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 7/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 89 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2024-11-10 18:22:10,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 48 transitions, 110 flow [2024-11-10 18:22:10,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 45 transitions, 102 flow [2024-11-10 18:22:10,252 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:22:10,261 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;@722dad99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:22:10,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-10 18:22:10,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:22:10,270 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:22:10,270 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:22:10,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:10,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:10,274 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:10,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash 13169199, now seen corresponding path program 1 times [2024-11-10 18:22:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346585439] [2024-11-10 18:22:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346585439] [2024-11-10 18:22:10,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346585439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:10,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:22:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571818464] [2024-11-10 18:22:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:10,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:10,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:10,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:10,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-10 18:22:10,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:10,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:10,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:10,945 INFO L124 PetriNetUnfolderBase]: 177/358 cut-off events. [2024-11-10 18:22:10,945 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-10 18:22:10,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 358 events. 177/358 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2000 event pairs, 154 based on Foata normal form. 46/273 useless extension candidates. Maximal degree in co-relation 642. Up to 304 conditions per place. [2024-11-10 18:22:10,956 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 23 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-10 18:22:10,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 138 flow [2024-11-10 18:22:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-10 18:22:10,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-11-10 18:22:10,972 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 102 flow. Second operand 3 states and 79 transitions. [2024-11-10 18:22:10,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 138 flow [2024-11-10 18:22:10,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:22:10,980 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 84 flow [2024-11-10 18:22:10,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-10 18:22:10,986 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2024-11-10 18:22:10,986 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 84 flow [2024-11-10 18:22:10,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-11-10 18:22:10,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:10,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:22:10,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:22:10,988 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:10,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash 13169200, now seen corresponding path program 1 times [2024-11-10 18:22:10,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171095331] [2024-11-10 18:22:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171095331] [2024-11-10 18:22:11,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171095331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:11,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:11,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979124786] [2024-11-10 18:22:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:11,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:11,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:11,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 18:22:11,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:11,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:11,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:11,518 INFO L124 PetriNetUnfolderBase]: 178/363 cut-off events. [2024-11-10 18:22:11,518 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 18:22:11,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 363 events. 178/363 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2019 event pairs, 154 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 663. Up to 309 conditions per place. [2024-11-10 18:22:11,524 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 25 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-11-10 18:22:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 150 flow [2024-11-10 18:22:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-10 18:22:11,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-11-10 18:22:11,529 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 84 flow. Second operand 4 states and 94 transitions. [2024-11-10 18:22:11,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 150 flow [2024-11-10 18:22:11,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:11,531 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 107 flow [2024-11-10 18:22:11,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-10 18:22:11,533 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2024-11-10 18:22:11,534 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 107 flow [2024-11-10 18:22:11,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 18:22:11,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:11,535 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:22:11,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:22:11,535 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:11,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1482031916, now seen corresponding path program 1 times [2024-11-10 18:22:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234389524] [2024-11-10 18:22:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234389524] [2024-11-10 18:22:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234389524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008726483] [2024-11-10 18:22:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:12,032 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) [2024-11-10 18:22:12,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:22:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:12,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:22:12,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:12,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:22:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:12,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:12,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008726483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:12,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:12,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:22:12,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407061166] [2024-11-10 18:22:12,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:12,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:22:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:22:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:22:12,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-10 18:22:12,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-10 18:22:12,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:12,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-10 18:22:12,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:12,949 INFO L124 PetriNetUnfolderBase]: 179/367 cut-off events. [2024-11-10 18:22:12,949 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-10 18:22:12,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 367 events. 179/367 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2068 event pairs, 154 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 673. Up to 306 conditions per place. [2024-11-10 18:22:12,957 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 10 changer transitions 0/45 dead transitions. [2024-11-10 18:22:12,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 187 flow [2024-11-10 18:22:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:22:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:22:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-10 18:22:12,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-11-10 18:22:12,964 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 107 flow. Second operand 8 states and 156 transitions. [2024-11-10 18:22:12,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 187 flow [2024-11-10 18:22:12,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:22:12,968 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 132 flow [2024-11-10 18:22:12,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-10 18:22:12,971 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-11-10 18:22:12,971 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 132 flow [2024-11-10 18:22:12,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-10 18:22:12,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:12,975 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:13,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:22:13,176 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 [2024-11-10 18:22:13,177 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:13,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1820238190, now seen corresponding path program 1 times [2024-11-10 18:22:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:13,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046592495] [2024-11-10 18:22:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046592495] [2024-11-10 18:22:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046592495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:13,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:13,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:13,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937783854] [2024-11-10 18:22:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:13,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:13,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-11-10 18:22:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:13,388 INFO L124 PetriNetUnfolderBase]: 119/256 cut-off events. [2024-11-10 18:22:13,388 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-10 18:22:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 256 events. 119/256 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1187 event pairs, 98 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 459. Up to 204 conditions per place. [2024-11-10 18:22:13,392 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-10 18:22:13,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 182 flow [2024-11-10 18:22:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-11-10 18:22:13,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2024-11-10 18:22:13,396 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 132 flow. Second operand 4 states and 89 transitions. [2024-11-10 18:22:13,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 182 flow [2024-11-10 18:22:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-10 18:22:13,398 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 102 flow [2024-11-10 18:22:13,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-10 18:22:13,399 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-11-10 18:22:13,400 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 102 flow [2024-11-10 18:22:13,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-11-10 18:22:13,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:13,400 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:13,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:22:13,401 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:13,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:13,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1820238191, now seen corresponding path program 1 times [2024-11-10 18:22:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385997107] [2024-11-10 18:22:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385997107] [2024-11-10 18:22:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385997107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:13,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:13,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370401190] [2024-11-10 18:22:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:13,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:13,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-10 18:22:13,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:13,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:13,565 INFO L124 PetriNetUnfolderBase]: 125/287 cut-off events. [2024-11-10 18:22:13,565 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:22:13,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 287 events. 125/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1325 event pairs, 105 based on Foata normal form. 7/226 useless extension candidates. Maximal degree in co-relation 449. Up to 211 conditions per place. [2024-11-10 18:22:13,572 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 26 selfloop transitions, 2 changer transitions 8/47 dead transitions. [2024-11-10 18:22:13,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 190 flow [2024-11-10 18:22:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:22:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:22:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-11-10 18:22:13,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-11-10 18:22:13,574 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 102 flow. Second operand 5 states and 119 transitions. [2024-11-10 18:22:13,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 190 flow [2024-11-10 18:22:13,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:13,575 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 113 flow [2024-11-10 18:22:13,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-11-10 18:22:13,579 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-11-10 18:22:13,580 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 113 flow [2024-11-10 18:22:13,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-10 18:22:13,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:13,580 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:13,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:22:13,581 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:13,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1063203341, now seen corresponding path program 1 times [2024-11-10 18:22:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:13,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855889246] [2024-11-10 18:22:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:13,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:13,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855889246] [2024-11-10 18:22:13,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855889246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:13,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:13,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:22:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750245161] [2024-11-10 18:22:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:13,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:22:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:13,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:22:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:22:13,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:13,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2024-11-10 18:22:13,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:13,852 INFO L124 PetriNetUnfolderBase]: 70/163 cut-off events. [2024-11-10 18:22:13,852 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-10 18:22:13,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 163 events. 70/163 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 560 event pairs, 54 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 330. Up to 122 conditions per place. [2024-11-10 18:22:13,854 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-10 18:22:13,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 151 flow [2024-11-10 18:22:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-11-10 18:22:13,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-10 18:22:13,856 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 113 flow. Second operand 4 states and 87 transitions. [2024-11-10 18:22:13,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 151 flow [2024-11-10 18:22:13,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:13,858 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 103 flow [2024-11-10 18:22:13,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-10 18:22:13,859 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-11-10 18:22:13,859 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 103 flow [2024-11-10 18:22:13,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2024-11-10 18:22:13,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:13,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:13,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:22:13,860 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:13,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2054360843, now seen corresponding path program 1 times [2024-11-10 18:22:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:13,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195377420] [2024-11-10 18:22:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:13,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:14,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:14,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195377420] [2024-11-10 18:22:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195377420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:14,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:14,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 18:22:14,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409670549] [2024-11-10 18:22:14,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:14,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:22:14,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:22:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:22:14,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-11-10 18:22:14,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 103 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-11-10 18:22:14,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:14,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-11-10 18:22:14,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:14,228 INFO L124 PetriNetUnfolderBase]: 273/557 cut-off events. [2024-11-10 18:22:14,228 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-11-10 18:22:14,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 557 events. 273/557 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2670 event pairs, 67 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 1138. Up to 179 conditions per place. [2024-11-10 18:22:14,233 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 58 selfloop transitions, 12 changer transitions 8/86 dead transitions. [2024-11-10 18:22:14,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 389 flow [2024-11-10 18:22:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:22:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:22:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-11-10 18:22:14,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44212962962962965 [2024-11-10 18:22:14,235 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 103 flow. Second operand 9 states and 191 transitions. [2024-11-10 18:22:14,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 389 flow [2024-11-10 18:22:14,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:14,240 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 174 flow [2024-11-10 18:22:14,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-11-10 18:22:14,242 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-11-10 18:22:14,242 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 174 flow [2024-11-10 18:22:14,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-11-10 18:22:14,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:14,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:14,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:22:14,243 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:14,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash -678594013, now seen corresponding path program 2 times [2024-11-10 18:22:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:14,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604426071] [2024-11-10 18:22:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604426071] [2024-11-10 18:22:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604426071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:14,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:14,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:22:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243714707] [2024-11-10 18:22:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:14,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:22:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:22:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:22:14,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-10 18:22:14,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-11-10 18:22:14,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:14,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-10 18:22:14,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:14,387 INFO L124 PetriNetUnfolderBase]: 126/316 cut-off events. [2024-11-10 18:22:14,389 INFO L125 PetriNetUnfolderBase]: For 181/188 co-relation queries the response was YES. [2024-11-10 18:22:14,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 316 events. 126/316 cut-off events. For 181/188 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1304 event pairs, 27 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 755. Up to 193 conditions per place. [2024-11-10 18:22:14,392 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 29 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-11-10 18:22:14,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 245 flow [2024-11-10 18:22:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:22:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:22:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-10 18:22:14,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-11-10 18:22:14,397 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 174 flow. Second operand 3 states and 77 transitions. [2024-11-10 18:22:14,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 245 flow [2024-11-10 18:22:14,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 233 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:22:14,400 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 175 flow [2024-11-10 18:22:14,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-10 18:22:14,402 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-11-10 18:22:14,402 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 175 flow [2024-11-10 18:22:14,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-11-10 18:22:14,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:14,403 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:14,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:22:14,403 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:14,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1075183226, now seen corresponding path program 1 times [2024-11-10 18:22:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:14,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354870978] [2024-11-10 18:22:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354870978] [2024-11-10 18:22:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354870978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839884784] [2024-11-10 18:22:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:14,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:14,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:14,581 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) [2024-11-10 18:22:14,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:22:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:14,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:22:14,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:14,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839884784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:14,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:14,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-10 18:22:14,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682646962] [2024-11-10 18:22:14,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:14,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:22:14,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:22:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:22:14,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:14,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 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) [2024-11-10 18:22:14,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:14,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:14,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:15,024 INFO L124 PetriNetUnfolderBase]: 199/526 cut-off events. [2024-11-10 18:22:15,025 INFO L125 PetriNetUnfolderBase]: For 526/553 co-relation queries the response was YES. [2024-11-10 18:22:15,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 526 events. 199/526 cut-off events. For 526/553 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2750 event pairs, 104 based on Foata normal form. 24/513 useless extension candidates. Maximal degree in co-relation 784. Up to 224 conditions per place. [2024-11-10 18:22:15,029 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 40 selfloop transitions, 8 changer transitions 3/67 dead transitions. [2024-11-10 18:22:15,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 355 flow [2024-11-10 18:22:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:22:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:22:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-11-10 18:22:15,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4557291666666667 [2024-11-10 18:22:15,031 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 175 flow. Second operand 8 states and 175 transitions. [2024-11-10 18:22:15,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 355 flow [2024-11-10 18:22:15,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 334 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-10 18:22:15,034 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 202 flow [2024-11-10 18:22:15,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=202, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-11-10 18:22:15,035 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-11-10 18:22:15,036 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 202 flow [2024-11-10 18:22:15,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 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) [2024-11-10 18:22:15,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:15,036 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, 1, 1] [2024-11-10 18:22:15,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:22:15,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-10 18:22:15,238 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:15,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1386588244, now seen corresponding path program 1 times [2024-11-10 18:22:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:15,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277577349] [2024-11-10 18:22:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277577349] [2024-11-10 18:22:15,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277577349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:22:15,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:22:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:22:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133434137] [2024-11-10 18:22:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:22:15,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:22:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:22:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:22:15,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-10 18:22:15,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-11-10 18:22:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-10 18:22:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:15,427 INFO L124 PetriNetUnfolderBase]: 206/625 cut-off events. [2024-11-10 18:22:15,427 INFO L125 PetriNetUnfolderBase]: For 438/457 co-relation queries the response was YES. [2024-11-10 18:22:15,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 625 events. 206/625 cut-off events. For 438/457 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3434 event pairs, 43 based on Foata normal form. 19/628 useless extension candidates. Maximal degree in co-relation 1225. Up to 144 conditions per place. [2024-11-10 18:22:15,432 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 44 selfloop transitions, 7 changer transitions 5/72 dead transitions. [2024-11-10 18:22:15,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 390 flow [2024-11-10 18:22:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:22:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:22:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-10 18:22:15,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-11-10 18:22:15,434 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 202 flow. Second operand 4 states and 113 transitions. [2024-11-10 18:22:15,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 390 flow [2024-11-10 18:22:15,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 367 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-10 18:22:15,437 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 205 flow [2024-11-10 18:22:15,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2024-11-10 18:22:15,438 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-11-10 18:22:15,439 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 205 flow [2024-11-10 18:22:15,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-11-10 18:22:15,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:15,439 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:15,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:22:15,439 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:15,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1166415260, now seen corresponding path program 2 times [2024-11-10 18:22:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:15,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039496759] [2024-11-10 18:22:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:15,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039496759] [2024-11-10 18:22:15,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039496759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583910529] [2024-11-10 18:22:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:15,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:15,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:15,931 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) [2024-11-10 18:22:15,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:22:16,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:16,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:16,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:22:16,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:16,266 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 12 treesize of output 3 [2024-11-10 18:22:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:16,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:16,453 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:22:16,454 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 11 [2024-11-10 18:22:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583910529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:16,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:16,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 22 [2024-11-10 18:22:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094096026] [2024-11-10 18:22:16,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:16,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 18:22:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 18:22:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-11-10 18:22:16,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-10 18:22:16,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 205 flow. Second operand has 23 states, 23 states have (on average 16.652173913043477) internal successors, (383), 23 states have internal predecessors, (383), 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) [2024-11-10 18:22:16,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:16,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-10 18:22:16,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:17,769 INFO L124 PetriNetUnfolderBase]: 479/1234 cut-off events. [2024-11-10 18:22:17,770 INFO L125 PetriNetUnfolderBase]: For 1543/1543 co-relation queries the response was YES. [2024-11-10 18:22:17,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 1234 events. 479/1234 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7477 event pairs, 84 based on Foata normal form. 89/1307 useless extension candidates. Maximal degree in co-relation 2058. Up to 280 conditions per place. [2024-11-10 18:22:17,780 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 91 selfloop transitions, 17 changer transitions 11/132 dead transitions. [2024-11-10 18:22:17,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 132 transitions, 809 flow [2024-11-10 18:22:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:22:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:22:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 353 transitions. [2024-11-10 18:22:17,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4325980392156863 [2024-11-10 18:22:17,783 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 205 flow. Second operand 17 states and 353 transitions. [2024-11-10 18:22:17,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 132 transitions, 809 flow [2024-11-10 18:22:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 132 transitions, 749 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-11-10 18:22:17,788 INFO L231 Difference]: Finished difference. Result has 81 places, 59 transitions, 378 flow [2024-11-10 18:22:17,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=378, PETRI_PLACES=81, PETRI_TRANSITIONS=59} [2024-11-10 18:22:17,789 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-11-10 18:22:17,789 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 59 transitions, 378 flow [2024-11-10 18:22:17,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 16.652173913043477) internal successors, (383), 23 states have internal predecessors, (383), 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) [2024-11-10 18:22:17,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:17,790 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:17,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:22:17,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:17,991 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:17,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2011973222, now seen corresponding path program 3 times [2024-11-10 18:22:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:17,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303507608] [2024-11-10 18:22:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:18,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303507608] [2024-11-10 18:22:18,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303507608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403160163] [2024-11-10 18:22:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:22:18,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:18,465 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) [2024-11-10 18:22:18,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:22:18,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:22:18,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:18,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 18:22:18,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:18,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:18,656 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 18:22:18,657 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 [2024-11-10 18:22:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403160163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:18,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:18,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-11-10 18:22:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482817687] [2024-11-10 18:22:18,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:18,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:22:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:22:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:22:18,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-10 18:22:18,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 59 transitions, 378 flow. Second operand has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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) [2024-11-10 18:22:18,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-10 18:22:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:19,181 INFO L124 PetriNetUnfolderBase]: 389/1032 cut-off events. [2024-11-10 18:22:19,181 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-11-10 18:22:19,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 1032 events. 389/1032 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5843 event pairs, 46 based on Foata normal form. 27/1052 useless extension candidates. Maximal degree in co-relation 2355. Up to 283 conditions per place. [2024-11-10 18:22:19,189 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 79 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-11-10 18:22:19,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 873 flow [2024-11-10 18:22:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:22:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:22:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 260 transitions. [2024-11-10 18:22:19,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-10 18:22:19,192 INFO L175 Difference]: Start difference. First operand has 81 places, 59 transitions, 378 flow. Second operand 13 states and 260 transitions. [2024-11-10 18:22:19,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 873 flow [2024-11-10 18:22:19,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 782 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-11-10 18:22:19,199 INFO L231 Difference]: Finished difference. Result has 86 places, 61 transitions, 419 flow [2024-11-10 18:22:19,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=419, PETRI_PLACES=86, PETRI_TRANSITIONS=61} [2024-11-10 18:22:19,200 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-11-10 18:22:19,200 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 61 transitions, 419 flow [2024-11-10 18:22:19,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 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) [2024-11-10 18:22:19,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:19,201 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:19,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:22:19,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:19,405 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:19,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash -32067111, now seen corresponding path program 1 times [2024-11-10 18:22:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:19,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502368535] [2024-11-10 18:22:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502368535] [2024-11-10 18:22:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502368535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130119296] [2024-11-10 18:22:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:20,207 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) [2024-11-10 18:22:20,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:22:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:20,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:22:20,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:20,714 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 [2024-11-10 18:22:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:20,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:21,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:21,231 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 26 treesize of output 18 [2024-11-10 18:22:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130119296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:21,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:21,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2024-11-10 18:22:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780860115] [2024-11-10 18:22:21,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:21,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-10 18:22:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-10 18:22:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2024-11-10 18:22:21,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:21,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 61 transitions, 419 flow. Second operand has 41 states, 41 states have (on average 12.048780487804878) internal successors, (494), 41 states have internal predecessors, (494), 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) [2024-11-10 18:22:21,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:21,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:21,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:25,733 INFO L124 PetriNetUnfolderBase]: 1122/2459 cut-off events. [2024-11-10 18:22:25,733 INFO L125 PetriNetUnfolderBase]: For 5437/5437 co-relation queries the response was YES. [2024-11-10 18:22:25,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 2459 events. 1122/2459 cut-off events. For 5437/5437 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15368 event pairs, 128 based on Foata normal form. 2/2461 useless extension candidates. Maximal degree in co-relation 5436. Up to 867 conditions per place. [2024-11-10 18:22:25,752 INFO L140 encePairwiseOnDemand]: 30/48 looper letters, 134 selfloop transitions, 100 changer transitions 87/326 dead transitions. [2024-11-10 18:22:25,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 326 transitions, 2245 flow [2024-11-10 18:22:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-10 18:22:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-10 18:22:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 814 transitions. [2024-11-10 18:22:25,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3199685534591195 [2024-11-10 18:22:25,757 INFO L175 Difference]: Start difference. First operand has 86 places, 61 transitions, 419 flow. Second operand 53 states and 814 transitions. [2024-11-10 18:22:25,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 326 transitions, 2245 flow [2024-11-10 18:22:25,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 326 transitions, 2156 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-11-10 18:22:25,775 INFO L231 Difference]: Finished difference. Result has 146 places, 143 transitions, 1306 flow [2024-11-10 18:22:25,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1306, PETRI_PLACES=146, PETRI_TRANSITIONS=143} [2024-11-10 18:22:25,776 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-11-10 18:22:25,776 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 143 transitions, 1306 flow [2024-11-10 18:22:25,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 12.048780487804878) internal successors, (494), 41 states have internal predecessors, (494), 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) [2024-11-10 18:22:25,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:25,777 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:25,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:22:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-10 18:22:25,982 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:25,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1465099235, now seen corresponding path program 2 times [2024-11-10 18:22:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649535141] [2024-11-10 18:22:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:25,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649535141] [2024-11-10 18:22:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649535141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289377840] [2024-11-10 18:22:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:26,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:26,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:26,643 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) [2024-11-10 18:22:26,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:22:26,724 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:26,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:26,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 18:22:26,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:27,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:27,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:27,715 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 26 treesize of output 18 [2024-11-10 18:22:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:28,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289377840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:28,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:28,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 41 [2024-11-10 18:22:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064125208] [2024-11-10 18:22:28,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:28,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-10 18:22:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-10 18:22:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2024-11-10 18:22:28,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:28,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 143 transitions, 1306 flow. Second operand has 42 states, 42 states have (on average 12.047619047619047) internal successors, (506), 42 states have internal predecessors, (506), 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) [2024-11-10 18:22:28,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:28,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:28,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:30,296 INFO L124 PetriNetUnfolderBase]: 1086/2309 cut-off events. [2024-11-10 18:22:30,297 INFO L125 PetriNetUnfolderBase]: For 10887/10887 co-relation queries the response was YES. [2024-11-10 18:22:30,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9466 conditions, 2309 events. 1086/2309 cut-off events. For 10887/10887 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13846 event pairs, 135 based on Foata normal form. 3/2299 useless extension candidates. Maximal degree in co-relation 9403. Up to 879 conditions per place. [2024-11-10 18:22:30,320 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 171 selfloop transitions, 76 changer transitions 33/285 dead transitions. [2024-11-10 18:22:30,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 285 transitions, 2747 flow [2024-11-10 18:22:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-10 18:22:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-10 18:22:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 591 transitions. [2024-11-10 18:22:30,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32401315789473684 [2024-11-10 18:22:30,323 INFO L175 Difference]: Start difference. First operand has 146 places, 143 transitions, 1306 flow. Second operand 38 states and 591 transitions. [2024-11-10 18:22:30,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 285 transitions, 2747 flow [2024-11-10 18:22:30,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 285 transitions, 2559 flow, removed 84 selfloop flow, removed 14 redundant places. [2024-11-10 18:22:30,361 INFO L231 Difference]: Finished difference. Result has 159 places, 149 transitions, 1523 flow [2024-11-10 18:22:30,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1523, PETRI_PLACES=159, PETRI_TRANSITIONS=149} [2024-11-10 18:22:30,362 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-11-10 18:22:30,363 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 149 transitions, 1523 flow [2024-11-10 18:22:30,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 12.047619047619047) internal successors, (506), 42 states have internal predecessors, (506), 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) [2024-11-10 18:22:30,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:30,363 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:30,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:30,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:30,568 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:30,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1714258131, now seen corresponding path program 3 times [2024-11-10 18:22:30,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:30,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971480290] [2024-11-10 18:22:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:30,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971480290] [2024-11-10 18:22:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971480290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578986819] [2024-11-10 18:22:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:22:31,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:31,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:31,313 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) [2024-11-10 18:22:31,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:22:31,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:22:31,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:31,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:22:31,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:31,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:31,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:31,951 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 37 treesize of output 21 [2024-11-10 18:22:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578986819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:32,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 34 [2024-11-10 18:22:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242027481] [2024-11-10 18:22:32,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:32,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 18:22:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 18:22:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 18:22:32,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:32,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 149 transitions, 1523 flow. Second operand has 35 states, 35 states have (on average 12.0) internal successors, (420), 35 states have internal predecessors, (420), 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) [2024-11-10 18:22:32,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:32,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:32,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:33,996 INFO L124 PetriNetUnfolderBase]: 1343/2851 cut-off events. [2024-11-10 18:22:33,997 INFO L125 PetriNetUnfolderBase]: For 15422/15440 co-relation queries the response was YES. [2024-11-10 18:22:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12419 conditions, 2851 events. 1343/2851 cut-off events. For 15422/15440 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18228 event pairs, 101 based on Foata normal form. 8/2859 useless extension candidates. Maximal degree in co-relation 12346. Up to 599 conditions per place. [2024-11-10 18:22:34,107 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 198 selfloop transitions, 137 changer transitions 35/375 dead transitions. [2024-11-10 18:22:34,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 375 transitions, 4105 flow [2024-11-10 18:22:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-10 18:22:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-10 18:22:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 635 transitions. [2024-11-10 18:22:34,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3307291666666667 [2024-11-10 18:22:34,112 INFO L175 Difference]: Start difference. First operand has 159 places, 149 transitions, 1523 flow. Second operand 40 states and 635 transitions. [2024-11-10 18:22:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 375 transitions, 4105 flow [2024-11-10 18:22:34,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 375 transitions, 3903 flow, removed 35 selfloop flow, removed 24 redundant places. [2024-11-10 18:22:34,156 INFO L231 Difference]: Finished difference. Result has 178 places, 209 transitions, 2403 flow [2024-11-10 18:22:34,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2403, PETRI_PLACES=178, PETRI_TRANSITIONS=209} [2024-11-10 18:22:34,159 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-11-10 18:22:34,159 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 209 transitions, 2403 flow [2024-11-10 18:22:34,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 12.0) internal successors, (420), 35 states have internal predecessors, (420), 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) [2024-11-10 18:22:34,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:34,159 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:34,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:34,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:34,360 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:34,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -874897409, now seen corresponding path program 4 times [2024-11-10 18:22:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830250100] [2024-11-10 18:22:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:34,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830250100] [2024-11-10 18:22:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830250100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154329625] [2024-11-10 18:22:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:22:34,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:34,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:34,939 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) [2024-11-10 18:22:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:22:35,019 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:22:35,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:35,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:22:35,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:35,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:35,397 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 15 [2024-11-10 18:22:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:35,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:35,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:35,981 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 26 treesize of output 18 [2024-11-10 18:22:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154329625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:36,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:36,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-11-10 18:22:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287052559] [2024-11-10 18:22:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:36,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-10 18:22:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-10 18:22:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2024-11-10 18:22:36,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:36,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 209 transitions, 2403 flow. Second operand has 42 states, 42 states have (on average 12.0) internal successors, (504), 42 states have internal predecessors, (504), 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) [2024-11-10 18:22:36,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:36,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:36,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:38,775 INFO L124 PetriNetUnfolderBase]: 1296/2734 cut-off events. [2024-11-10 18:22:38,775 INFO L125 PetriNetUnfolderBase]: For 19886/19902 co-relation queries the response was YES. [2024-11-10 18:22:38,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13468 conditions, 2734 events. 1296/2734 cut-off events. For 19886/19902 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 17165 event pairs, 173 based on Foata normal form. 11/2744 useless extension candidates. Maximal degree in co-relation 13399. Up to 1264 conditions per place. [2024-11-10 18:22:38,801 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 167 selfloop transitions, 107 changer transitions 64/343 dead transitions. [2024-11-10 18:22:38,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 343 transitions, 4007 flow [2024-11-10 18:22:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-10 18:22:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-10 18:22:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 594 transitions. [2024-11-10 18:22:38,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.309375 [2024-11-10 18:22:38,806 INFO L175 Difference]: Start difference. First operand has 178 places, 209 transitions, 2403 flow. Second operand 40 states and 594 transitions. [2024-11-10 18:22:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 343 transitions, 4007 flow [2024-11-10 18:22:38,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 343 transitions, 3820 flow, removed 72 selfloop flow, removed 20 redundant places. [2024-11-10 18:22:38,872 INFO L231 Difference]: Finished difference. Result has 205 places, 213 transitions, 2737 flow [2024-11-10 18:22:38,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2737, PETRI_PLACES=205, PETRI_TRANSITIONS=213} [2024-11-10 18:22:38,877 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-11-10 18:22:38,878 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 213 transitions, 2737 flow [2024-11-10 18:22:38,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 12.0) internal successors, (504), 42 states have internal predecessors, (504), 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) [2024-11-10 18:22:38,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:38,878 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:38,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:39,079 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,SelfDestructingSolverStorable15 [2024-11-10 18:22:39,079 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:39,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1797798277, now seen corresponding path program 5 times [2024-11-10 18:22:39,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206960153] [2024-11-10 18:22:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206960153] [2024-11-10 18:22:40,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206960153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:40,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428535067] [2024-11-10 18:22:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:22:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:40,127 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) [2024-11-10 18:22:40,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:22:40,209 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-10 18:22:40,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:40,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 18:22:40,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:40,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:40,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:40,797 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 37 treesize of output 21 [2024-11-10 18:22:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428535067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:40,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:40,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 38 [2024-11-10 18:22:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087228414] [2024-11-10 18:22:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:40,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-10 18:22:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-10 18:22:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1346, Unknown=0, NotChecked=0, Total=1482 [2024-11-10 18:22:41,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:41,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 213 transitions, 2737 flow. Second operand has 39 states, 39 states have (on average 12.051282051282051) internal successors, (470), 39 states have internal predecessors, (470), 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) [2024-11-10 18:22:41,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:41,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:41,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:42,837 INFO L124 PetriNetUnfolderBase]: 1427/3011 cut-off events. [2024-11-10 18:22:42,837 INFO L125 PetriNetUnfolderBase]: For 31488/31542 co-relation queries the response was YES. [2024-11-10 18:22:42,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16131 conditions, 3011 events. 1427/3011 cut-off events. For 31488/31542 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 19230 event pairs, 98 based on Foata normal form. 21/3032 useless extension candidates. Maximal degree in co-relation 16047. Up to 583 conditions per place. [2024-11-10 18:22:42,873 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 230 selfloop transitions, 130 changer transitions 33/398 dead transitions. [2024-11-10 18:22:42,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 398 transitions, 5080 flow [2024-11-10 18:22:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-10 18:22:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-10 18:22:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 563 transitions. [2024-11-10 18:22:42,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3351190476190476 [2024-11-10 18:22:42,876 INFO L175 Difference]: Start difference. First operand has 205 places, 213 transitions, 2737 flow. Second operand 35 states and 563 transitions. [2024-11-10 18:22:42,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 398 transitions, 5080 flow [2024-11-10 18:22:42,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 398 transitions, 4821 flow, removed 44 selfloop flow, removed 28 redundant places. [2024-11-10 18:22:42,985 INFO L231 Difference]: Finished difference. Result has 196 places, 234 transitions, 3121 flow [2024-11-10 18:22:42,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3121, PETRI_PLACES=196, PETRI_TRANSITIONS=234} [2024-11-10 18:22:42,986 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-11-10 18:22:42,986 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 234 transitions, 3121 flow [2024-11-10 18:22:42,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 12.051282051282051) internal successors, (470), 39 states have internal predecessors, (470), 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) [2024-11-10 18:22:42,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:42,987 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:43,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:43,191 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,SelfDestructingSolverStorable16 [2024-11-10 18:22:43,192 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:43,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2143976115, now seen corresponding path program 6 times [2024-11-10 18:22:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495295699] [2024-11-10 18:22:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:43,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:44,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495295699] [2024-11-10 18:22:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495295699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244948826] [2024-11-10 18:22:44,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 18:22:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:44,403 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) [2024-11-10 18:22:44,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:22:44,495 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 18:22:44,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:44,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:22:44,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:44,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:44,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:44,984 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 26 treesize of output 18 [2024-11-10 18:22:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:45,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244948826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:45,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:45,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-11-10 18:22:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553039164] [2024-11-10 18:22:45,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:45,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 18:22:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 18:22:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 18:22:45,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:45,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 234 transitions, 3121 flow. Second operand has 35 states, 35 states have (on average 12.085714285714285) internal successors, (423), 35 states have internal predecessors, (423), 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) [2024-11-10 18:22:45,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:45,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:45,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:47,085 INFO L124 PetriNetUnfolderBase]: 1398/2940 cut-off events. [2024-11-10 18:22:47,085 INFO L125 PetriNetUnfolderBase]: For 30810/30882 co-relation queries the response was YES. [2024-11-10 18:22:47,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 2940 events. 1398/2940 cut-off events. For 30810/30882 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 18630 event pairs, 198 based on Foata normal form. 25/2965 useless extension candidates. Maximal degree in co-relation 15895. Up to 1166 conditions per place. [2024-11-10 18:22:47,114 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 175 selfloop transitions, 161 changer transitions 43/384 dead transitions. [2024-11-10 18:22:47,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 384 transitions, 5051 flow [2024-11-10 18:22:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-10 18:22:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-10 18:22:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 620 transitions. [2024-11-10 18:22:47,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2024-11-10 18:22:47,120 INFO L175 Difference]: Start difference. First operand has 196 places, 234 transitions, 3121 flow. Second operand 40 states and 620 transitions. [2024-11-10 18:22:47,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 384 transitions, 5051 flow [2024-11-10 18:22:47,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 384 transitions, 4919 flow, removed 32 selfloop flow, removed 14 redundant places. [2024-11-10 18:22:47,213 INFO L231 Difference]: Finished difference. Result has 224 places, 249 transitions, 3578 flow [2024-11-10 18:22:47,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3578, PETRI_PLACES=224, PETRI_TRANSITIONS=249} [2024-11-10 18:22:47,214 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-11-10 18:22:47,214 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 249 transitions, 3578 flow [2024-11-10 18:22:47,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 12.085714285714285) internal successors, (423), 35 states have internal predecessors, (423), 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) [2024-11-10 18:22:47,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:47,215 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:47,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 18:22:47,418 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,SelfDestructingSolverStorable17 [2024-11-10 18:22:47,419 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:47,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -462364603, now seen corresponding path program 7 times [2024-11-10 18:22:47,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:47,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711180175] [2024-11-10 18:22:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:47,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:48,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711180175] [2024-11-10 18:22:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711180175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447420079] [2024-11-10 18:22:48,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 18:22:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:48,341 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) [2024-11-10 18:22:48,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:22:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:48,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 18:22:48,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:22:48,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:48,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:22:48,933 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 26 treesize of output 18 [2024-11-10 18:22:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:49,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447420079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:49,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:49,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2024-11-10 18:22:49,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934817711] [2024-11-10 18:22:49,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:49,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 18:22:49,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 18:22:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 18:22:49,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:22:49,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 249 transitions, 3578 flow. Second operand has 35 states, 35 states have (on average 12.142857142857142) internal successors, (425), 35 states have internal predecessors, (425), 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) [2024-11-10 18:22:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:49,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:22:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:50,723 INFO L124 PetriNetUnfolderBase]: 1441/2991 cut-off events. [2024-11-10 18:22:50,723 INFO L125 PetriNetUnfolderBase]: For 32031/32052 co-relation queries the response was YES. [2024-11-10 18:22:50,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16841 conditions, 2991 events. 1441/2991 cut-off events. For 32031/32052 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 18497 event pairs, 247 based on Foata normal form. 13/3003 useless extension candidates. Maximal degree in co-relation 16766. Up to 1505 conditions per place. [2024-11-10 18:22:50,755 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 173 selfloop transitions, 138 changer transitions 31/347 dead transitions. [2024-11-10 18:22:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 347 transitions, 5032 flow [2024-11-10 18:22:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 18:22:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 18:22:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 418 transitions. [2024-11-10 18:22:50,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32253086419753085 [2024-11-10 18:22:50,757 INFO L175 Difference]: Start difference. First operand has 224 places, 249 transitions, 3578 flow. Second operand 27 states and 418 transitions. [2024-11-10 18:22:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 347 transitions, 5032 flow [2024-11-10 18:22:50,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 347 transitions, 4842 flow, removed 19 selfloop flow, removed 27 redundant places. [2024-11-10 18:22:50,856 INFO L231 Difference]: Finished difference. Result has 220 places, 255 transitions, 3985 flow [2024-11-10 18:22:50,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3985, PETRI_PLACES=220, PETRI_TRANSITIONS=255} [2024-11-10 18:22:50,857 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-11-10 18:22:50,857 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 255 transitions, 3985 flow [2024-11-10 18:22:50,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 12.142857142857142) internal successors, (425), 35 states have internal predecessors, (425), 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) [2024-11-10 18:22:50,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:50,858 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:50,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:22:51,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:51,059 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:51,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1754670732, now seen corresponding path program 8 times [2024-11-10 18:22:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89328130] [2024-11-10 18:22:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:22:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89328130] [2024-11-10 18:22:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89328130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195410083] [2024-11-10 18:22:51,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:22:51,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:51,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:51,234 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) [2024-11-10 18:22:51,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:22:51,320 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:22:51,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:51,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 18:22:51,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:51,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:51,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195410083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:51,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-10 18:22:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786810078] [2024-11-10 18:22:51,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:51,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 18:22:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 18:22:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-11-10 18:22:51,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-10 18:22:51,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 255 transitions, 3985 flow. Second operand has 23 states, 23 states have (on average 18.869565217391305) internal successors, (434), 23 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) [2024-11-10 18:22:51,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:51,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-10 18:22:51,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:52,635 INFO L124 PetriNetUnfolderBase]: 890/2213 cut-off events. [2024-11-10 18:22:52,635 INFO L125 PetriNetUnfolderBase]: For 31840/31998 co-relation queries the response was YES. [2024-11-10 18:22:52,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13413 conditions, 2213 events. 890/2213 cut-off events. For 31840/31998 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14855 event pairs, 117 based on Foata normal form. 62/2227 useless extension candidates. Maximal degree in co-relation 13342. Up to 633 conditions per place. [2024-11-10 18:22:52,663 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 152 selfloop transitions, 41 changer transitions 34/316 dead transitions. [2024-11-10 18:22:52,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 316 transitions, 4832 flow [2024-11-10 18:22:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:22:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:22:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 305 transitions. [2024-11-10 18:22:52,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4538690476190476 [2024-11-10 18:22:52,664 INFO L175 Difference]: Start difference. First operand has 220 places, 255 transitions, 3985 flow. Second operand 14 states and 305 transitions. [2024-11-10 18:22:52,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 316 transitions, 4832 flow [2024-11-10 18:22:52,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 316 transitions, 4744 flow, removed 15 selfloop flow, removed 19 redundant places. [2024-11-10 18:22:52,755 INFO L231 Difference]: Finished difference. Result has 209 places, 242 transitions, 3868 flow [2024-11-10 18:22:52,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3868, PETRI_PLACES=209, PETRI_TRANSITIONS=242} [2024-11-10 18:22:52,756 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-11-10 18:22:52,756 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 242 transitions, 3868 flow [2024-11-10 18:22:52,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.869565217391305) internal successors, (434), 23 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) [2024-11-10 18:22:52,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:52,757 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:52,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 18:22:52,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:52,959 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:52,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1775491332, now seen corresponding path program 9 times [2024-11-10 18:22:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100439664] [2024-11-10 18:22:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:22:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100439664] [2024-11-10 18:22:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100439664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121223099] [2024-11-10 18:22:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:22:53,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:53,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:53,541 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) [2024-11-10 18:22:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:22:53,615 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 18:22:53,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:53,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 18:22:53,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:53,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:53,774 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-10 18:22:53,775 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 26 treesize of output 14 [2024-11-10 18:22:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121223099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:53,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 19 [2024-11-10 18:22:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555337697] [2024-11-10 18:22:53,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:53,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:22:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:22:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:22:53,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-10 18:22:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 242 transitions, 3868 flow. Second operand has 20 states, 20 states have (on average 16.85) internal successors, (337), 20 states have internal predecessors, (337), 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) [2024-11-10 18:22:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-10 18:22:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:22:57,511 INFO L124 PetriNetUnfolderBase]: 3840/8455 cut-off events. [2024-11-10 18:22:57,511 INFO L125 PetriNetUnfolderBase]: For 162514/163027 co-relation queries the response was YES. [2024-11-10 18:22:57,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55266 conditions, 8455 events. 3840/8455 cut-off events. For 162514/163027 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 65914 event pairs, 188 based on Foata normal form. 595/8979 useless extension candidates. Maximal degree in co-relation 55132. Up to 2110 conditions per place. [2024-11-10 18:22:57,621 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 752 selfloop transitions, 310 changer transitions 8/1135 dead transitions. [2024-11-10 18:22:57,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1135 transitions, 19172 flow [2024-11-10 18:22:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-10 18:22:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-10 18:22:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1174 transitions. [2024-11-10 18:22:57,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4529320987654321 [2024-11-10 18:22:57,625 INFO L175 Difference]: Start difference. First operand has 209 places, 242 transitions, 3868 flow. Second operand 54 states and 1174 transitions. [2024-11-10 18:22:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1135 transitions, 19172 flow [2024-11-10 18:22:58,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1135 transitions, 18949 flow, removed 25 selfloop flow, removed 16 redundant places. [2024-11-10 18:22:58,142 INFO L231 Difference]: Finished difference. Result has 265 places, 520 transitions, 10661 flow [2024-11-10 18:22:58,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=10661, PETRI_PLACES=265, PETRI_TRANSITIONS=520} [2024-11-10 18:22:58,143 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-11-10 18:22:58,143 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 520 transitions, 10661 flow [2024-11-10 18:22:58,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.85) internal successors, (337), 20 states have internal predecessors, (337), 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) [2024-11-10 18:22:58,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:22:58,143 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:22:58,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 18:22:58,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-10 18:22:58,344 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:22:58,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:22:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135854, now seen corresponding path program 10 times [2024-11-10 18:22:58,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:22:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462099149] [2024-11-10 18:22:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:22:58,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:22:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:22:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:58,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:22:58,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462099149] [2024-11-10 18:22:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462099149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:22:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405156967] [2024-11-10 18:22:58,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:22:58,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:22:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:22:58,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:22:58,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:22:58,495 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:22:58,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:22:58,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:22:58,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:22:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:58,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:22:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:22:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405156967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:22:58,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:22:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-10 18:22:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733101791] [2024-11-10 18:22:58,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:22:58,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 18:22:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:22:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 18:22:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:22:58,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-10 18:22:58,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 520 transitions, 10661 flow. Second operand has 10 states, 10 states have (on average 20.9) internal successors, (209), 10 states have internal predecessors, (209), 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) [2024-11-10 18:22:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:22:58,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-10 18:22:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:02,329 INFO L124 PetriNetUnfolderBase]: 4637/11191 cut-off events. [2024-11-10 18:23:02,330 INFO L125 PetriNetUnfolderBase]: For 436138/437635 co-relation queries the response was YES. [2024-11-10 18:23:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88369 conditions, 11191 events. 4637/11191 cut-off events. For 436138/437635 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 101183 event pairs, 557 based on Foata normal form. 398/11357 useless extension candidates. Maximal degree in co-relation 88195. Up to 3147 conditions per place. [2024-11-10 18:23:02,664 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 369 selfloop transitions, 233 changer transitions 13/736 dead transitions. [2024-11-10 18:23:02,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 736 transitions, 15819 flow [2024-11-10 18:23:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-10 18:23:02,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-11-10 18:23:02,666 INFO L175 Difference]: Start difference. First operand has 265 places, 520 transitions, 10661 flow. Second operand 5 states and 143 transitions. [2024-11-10 18:23:02,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 736 transitions, 15819 flow [2024-11-10 18:23:05,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 736 transitions, 14475 flow, removed 527 selfloop flow, removed 17 redundant places. [2024-11-10 18:23:05,166 INFO L231 Difference]: Finished difference. Result has 253 places, 655 transitions, 13616 flow [2024-11-10 18:23:05,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13616, PETRI_PLACES=253, PETRI_TRANSITIONS=655} [2024-11-10 18:23:05,167 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-11-10 18:23:05,167 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 655 transitions, 13616 flow [2024-11-10 18:23:05,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.9) internal successors, (209), 10 states have internal predecessors, (209), 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) [2024-11-10 18:23:05,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:05,168 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:05,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-10 18:23:05,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:05,368 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:23:05,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1776692781, now seen corresponding path program 11 times [2024-11-10 18:23:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:05,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178230107] [2024-11-10 18:23:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178230107] [2024-11-10 18:23:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178230107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337816479] [2024-11-10 18:23:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:23:06,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:06,650 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:23:06,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 18:23:06,743 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-10 18:23:06,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:23:06,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-10 18:23:06,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:07,736 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-10 18:23:07,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-11-10 18:23:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:07,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:08,479 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-10 18:23:08,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-11-10 18:23:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337816479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:09,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2024-11-10 18:23:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348201516] [2024-11-10 18:23:09,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:09,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-10 18:23:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-10 18:23:09,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2024-11-10 18:23:09,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-10 18:23:09,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 655 transitions, 13616 flow. Second operand has 58 states, 58 states have (on average 11.89655172413793) internal successors, (690), 58 states have internal predecessors, (690), 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) [2024-11-10 18:23:09,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:09,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-10 18:23:09,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand