./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-prod-cons3.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 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:31:23,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:31:23,383 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:31:23,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:31:23,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:31:23,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:31:23,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:31:23,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:31:23,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:31:23,434 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:31:23,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:31:23,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:31:23,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:31:23,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:31:23,438 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:31:23,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:31:23,439 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:31:23,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:31:23,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:31:23,439 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:31:23,440 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:31:23,440 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:31:23,441 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:31:23,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:31:23,441 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:31:23,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:31:23,442 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:31:23,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:31:23,443 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:31:23,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:31:23,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:31:23,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:31:23,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:31:23,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:23,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:31:23,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:31:23,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:31:23,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:31:23,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:31:23,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:31:23,446 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:31:23,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:31:23,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 [2024-11-12 16:31:23,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:31:23,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:31:23,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:31:23,746 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:31:23,747 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:31:23,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-12 16:31:25,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:31:25,399 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:31:25,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-12 16:31:25,407 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf57e5f7/a2b293e146d848bb9284867fa67ffe0d/FLAG780806370 [2024-11-12 16:31:25,422 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf57e5f7/a2b293e146d848bb9284867fa67ffe0d [2024-11-12 16:31:25,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:31:25,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:31:25,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:25,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:31:25,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:31:25,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6752549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25, skipping insertion in model container [2024-11-12 16:31:25,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,465 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:31:25,652 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:31:25,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:25,663 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:31:25,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:25,712 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:31:25,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25 WrapperNode [2024-11-12 16:31:25,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:25,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:25,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:31:25,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:31:25,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,756 INFO L138 Inliner]: procedures = 25, calls = 54, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 258 [2024-11-12 16:31:25,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:25,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:31:25,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:31:25,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:31:25,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,775 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,792 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:31:25,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:31:25,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:31:25,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:31:25,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:31:25,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (1/1) ... [2024-11-12 16:31:25,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:25,869 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) [2024-11-12 16:31:25,872 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 [2024-11-12 16:31:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:31:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:31:25,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:31:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:31:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:31:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:31:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:31:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-12 16:31:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-12 16:31:25,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:31:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:31:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:31:25,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:31:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:31:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:31:25,916 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:31:26,019 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:31:26,020 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:31:26,468 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:31:26,468 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:31:26,839 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:31:26,840 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-12 16:31:26,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:26 BoogieIcfgContainer [2024-11-12 16:31:26,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:31:26,844 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:31:26,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:31:26,848 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:31:26,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:31:25" (1/3) ... [2024-11-12 16:31:26,849 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb0a405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:26, skipping insertion in model container [2024-11-12 16:31:26,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:25" (2/3) ... [2024-11-12 16:31:26,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb0a405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:26, skipping insertion in model container [2024-11-12 16:31:26,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:26" (3/3) ... [2024-11-12 16:31:26,852 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2024-11-12 16:31:26,873 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:31:26,873 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-12 16:31:26,873 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:31:26,953 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-12 16:31:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 67 transitions, 162 flow [2024-11-12 16:31:27,036 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2024-11-12 16:31:27,037 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:31:27,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 6/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 153 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-12 16:31:27,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 67 transitions, 162 flow [2024-11-12 16:31:27,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 62 transitions, 148 flow [2024-11-12 16:31:27,056 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:31:27,062 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;@2fe4d479, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:31:27,063 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-12 16:31:27,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:31:27,067 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:31:27,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:31:27,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:27,069 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:27,070 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:27,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash 741799, now seen corresponding path program 1 times [2024-11-12 16:31:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870441847] [2024-11-12 16:31:27,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:27,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:27,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870441847] [2024-11-12 16:31:27,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870441847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:27,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:27,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:31:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603059410] [2024-11-12 16:31:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:27,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:27,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:27,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2024-11-12 16:31:27,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:27,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:27,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:28,885 INFO L124 PetriNetUnfolderBase]: 7841/11938 cut-off events. [2024-11-12 16:31:28,886 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2024-11-12 16:31:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23244 conditions, 11938 events. 7841/11938 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 86985 event pairs, 6340 based on Foata normal form. 1/8027 useless extension candidates. Maximal degree in co-relation 22236. Up to 10274 conditions per place. [2024-11-12 16:31:29,017 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-12 16:31:29,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 222 flow [2024-11-12 16:31:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-12 16:31:29,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5472636815920398 [2024-11-12 16:31:29,031 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 148 flow. Second operand 3 states and 110 transitions. [2024-11-12 16:31:29,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 222 flow [2024-11-12 16:31:29,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-12 16:31:29,050 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 128 flow [2024-11-12 16:31:29,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-11-12 16:31:29,058 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2024-11-12 16:31:29,058 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 128 flow [2024-11-12 16:31:29,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2024-11-12 16:31:29,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:29,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:29,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:31:29,060 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:29,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 741800, now seen corresponding path program 1 times [2024-11-12 16:31:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:29,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405851331] [2024-11-12 16:31:29,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:29,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405851331] [2024-11-12 16:31:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405851331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:29,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640652568] [2024-11-12 16:31:29,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:29,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:29,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:29,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:29,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-12 16:31:29,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:29,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:29,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:30,463 INFO L124 PetriNetUnfolderBase]: 7842/11941 cut-off events. [2024-11-12 16:31:30,464 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-12 16:31:30,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22679 conditions, 11941 events. 7842/11941 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87078 event pairs, 6340 based on Foata normal form. 0/8027 useless extension candidates. Maximal degree in co-relation 22650. Up to 10283 conditions per place. [2024-11-12 16:31:30,634 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 42 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-12 16:31:30,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 226 flow [2024-11-12 16:31:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-12 16:31:30,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503731343283582 [2024-11-12 16:31:30,638 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-11-12 16:31:30,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 226 flow [2024-11-12 16:31:30,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:30,642 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 151 flow [2024-11-12 16:31:30,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-11-12 16:31:30,645 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2024-11-12 16:31:30,645 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 151 flow [2024-11-12 16:31:30,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-12 16:31:30,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:30,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:31:30,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:31:30,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:30,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash 22997769, now seen corresponding path program 1 times [2024-11-12 16:31:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710838072] [2024-11-12 16:31:30,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:30,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:30,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:30,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710838072] [2024-11-12 16:31:30,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710838072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:30,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:30,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908858948] [2024-11-12 16:31:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:30,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:31:30,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:30,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:30,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:30,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:30,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:32,064 INFO L124 PetriNetUnfolderBase]: 7843/11944 cut-off events. [2024-11-12 16:31:32,064 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-12 16:31:32,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22696 conditions, 11944 events. 7843/11944 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87105 event pairs, 6340 based on Foata normal form. 0/8029 useless extension candidates. Maximal degree in co-relation 22671. Up to 10282 conditions per place. [2024-11-12 16:31:32,188 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 42 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-12 16:31:32,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 255 flow [2024-11-12 16:31:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-12 16:31:32,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-11-12 16:31:32,193 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 151 flow. Second operand 5 states and 160 transitions. [2024-11-12 16:31:32,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 255 flow [2024-11-12 16:31:32,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:32,197 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 185 flow [2024-11-12 16:31:32,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-11-12 16:31:32,199 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-12 16:31:32,200 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 185 flow [2024-11-12 16:31:32,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:32,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:32,201 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:31:32,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:31:32,201 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:32,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 712893733, now seen corresponding path program 1 times [2024-11-12 16:31:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:32,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718895620] [2024-11-12 16:31:32,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718895620] [2024-11-12 16:31:32,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718895620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925366075] [2024-11-12 16:31:32,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:32,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:32,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:32,504 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) [2024-11-12 16:31:32,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:31:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:32,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:31:32,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:32,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:31:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:32,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925366075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:32,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:31:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410548928] [2024-11-12 16:31:32,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:32,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:31:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:31:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:31:32,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:32,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 185 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-12 16:31:32,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:32,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:34,064 INFO L124 PetriNetUnfolderBase]: 7844/11946 cut-off events. [2024-11-12 16:31:34,064 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-12 16:31:34,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22719 conditions, 11946 events. 7844/11946 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87114 event pairs, 6340 based on Foata normal form. 0/8034 useless extension candidates. Maximal degree in co-relation 22681. Up to 10283 conditions per place. [2024-11-12 16:31:34,138 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-12 16:31:34,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 298 flow [2024-11-12 16:31:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:31:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:31:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-11-12 16:31:34,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4216417910447761 [2024-11-12 16:31:34,143 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 185 flow. Second operand 8 states and 226 transitions. [2024-11-12 16:31:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 298 flow [2024-11-12 16:31:34,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:34,147 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 215 flow [2024-11-12 16:31:34,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-11-12 16:31:34,149 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-12 16:31:34,150 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 215 flow [2024-11-12 16:31:34,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-12 16:31:34,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:34,150 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:31:34,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:31:34,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:34,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:34,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash 626042671, now seen corresponding path program 1 times [2024-11-12 16:31:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:34,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154406279] [2024-11-12 16:31:34,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:34,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154406279] [2024-11-12 16:31:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154406279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681217732] [2024-11-12 16:31:34,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:34,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:34,579 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) [2024-11-12 16:31:34,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:31:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:34,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:31:34,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:34,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:31:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:34,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681217732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:34,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:31:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645022555] [2024-11-12 16:31:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:34,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:31:34,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:31:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:31:35,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:35,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 215 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-12 16:31:35,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:35,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:35,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:36,220 INFO L124 PetriNetUnfolderBase]: 7845/11948 cut-off events. [2024-11-12 16:31:36,221 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-12 16:31:36,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22735 conditions, 11948 events. 7845/11948 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87118 event pairs, 6340 based on Foata normal form. 0/8036 useless extension candidates. Maximal degree in co-relation 22689. Up to 10275 conditions per place. [2024-11-12 16:31:36,312 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 35 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-11-12 16:31:36,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 329 flow [2024-11-12 16:31:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:31:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:31:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-12 16:31:36,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41956882255389716 [2024-11-12 16:31:36,315 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 215 flow. Second operand 9 states and 253 transitions. [2024-11-12 16:31:36,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 329 flow [2024-11-12 16:31:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-12 16:31:36,318 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 212 flow [2024-11-12 16:31:36,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=212, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-12 16:31:36,319 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-12 16:31:36,319 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 212 flow [2024-11-12 16:31:36,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-12 16:31:36,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:36,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:36,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:31:36,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:36,525 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:36,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash -267135375, now seen corresponding path program 1 times [2024-11-12 16:31:36,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:36,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070790881] [2024-11-12 16:31:36,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:36,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070790881] [2024-11-12 16:31:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070790881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769635003] [2024-11-12 16:31:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:36,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:36,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:36,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-12 16:31:36,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-11-12 16:31:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:36,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-12 16:31:36,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:37,540 INFO L124 PetriNetUnfolderBase]: 8974/13584 cut-off events. [2024-11-12 16:31:37,541 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:31:37,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 13584 events. 8974/13584 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 98408 event pairs, 7442 based on Foata normal form. 264/9765 useless extension candidates. Maximal degree in co-relation 22422. Up to 10289 conditions per place. [2024-11-12 16:31:37,631 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-11-12 16:31:37,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 496 flow [2024-11-12 16:31:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-12 16:31:37,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5970149253731343 [2024-11-12 16:31:37,634 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 212 flow. Second operand 5 states and 200 transitions. [2024-11-12 16:31:37,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 496 flow [2024-11-12 16:31:37,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 443 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-12 16:31:37,637 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 218 flow [2024-11-12 16:31:37,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-12 16:31:37,638 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-12 16:31:37,638 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 218 flow [2024-11-12 16:31:37,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-11-12 16:31:37,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:37,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:37,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:31:37,639 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:37,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 91691054, now seen corresponding path program 1 times [2024-11-12 16:31:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147190887] [2024-11-12 16:31:37,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:37,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147190887] [2024-11-12 16:31:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147190887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326541734] [2024-11-12 16:31:37,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:37,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:37,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:37,912 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) [2024-11-12 16:31:37,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:31:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:38,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 16:31:38,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:38,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:31:38,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:31:38,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-12 16:31:38,110 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:31:38,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:31:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:38,156 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:31:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326541734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:38,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:31:38,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-12 16:31:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096113845] [2024-11-12 16:31:38,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:38,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:31:38,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:38,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-11-12 16:31:38,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:38,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:38,912 INFO L124 PetriNetUnfolderBase]: 6994/10942 cut-off events. [2024-11-12 16:31:38,912 INFO L125 PetriNetUnfolderBase]: For 808/808 co-relation queries the response was YES. [2024-11-12 16:31:38,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 10942 events. 6994/10942 cut-off events. For 808/808 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 78756 event pairs, 5898 based on Foata normal form. 0/8156 useless extension candidates. Maximal degree in co-relation 18707. Up to 9373 conditions per place. [2024-11-12 16:31:38,968 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 49 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-12 16:31:38,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 316 flow [2024-11-12 16:31:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-12 16:31:38,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2024-11-12 16:31:38,969 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 218 flow. Second operand 4 states and 129 transitions. [2024-11-12 16:31:38,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 316 flow [2024-11-12 16:31:38,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:38,972 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 213 flow [2024-11-12 16:31:38,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-12 16:31:38,973 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-12 16:31:38,973 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 213 flow [2024-11-12 16:31:38,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-11-12 16:31:38,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:38,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:38,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:31:39,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:39,175 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:39,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 91691053, now seen corresponding path program 1 times [2024-11-12 16:31:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607770839] [2024-11-12 16:31:39,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:31:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607770839] [2024-11-12 16:31:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607770839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:39,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159072227] [2024-11-12 16:31:39,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:39,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:39,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:39,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-12 16:31:39,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:39,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:39,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:39,700 INFO L124 PetriNetUnfolderBase]: 5302/8448 cut-off events. [2024-11-12 16:31:39,700 INFO L125 PetriNetUnfolderBase]: For 698/698 co-relation queries the response was YES. [2024-11-12 16:31:39,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16695 conditions, 8448 events. 5302/8448 cut-off events. For 698/698 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 58565 event pairs, 4566 based on Foata normal form. 0/6819 useless extension candidates. Maximal degree in co-relation 13039. Up to 7180 conditions per place. [2024-11-12 16:31:39,738 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 43 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-12 16:31:39,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 307 flow [2024-11-12 16:31:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-12 16:31:39,739 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44477611940298506 [2024-11-12 16:31:39,739 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 213 flow. Second operand 5 states and 149 transitions. [2024-11-12 16:31:39,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 307 flow [2024-11-12 16:31:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:39,742 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 216 flow [2024-11-12 16:31:39,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-12 16:31:39,742 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-12 16:31:39,743 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 216 flow [2024-11-12 16:31:39,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2024-11-12 16:31:39,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:39,743 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:39,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:31:39,744 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:39,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1704488768, now seen corresponding path program 1 times [2024-11-12 16:31:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718993266] [2024-11-12 16:31:39,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:39,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718993266] [2024-11-12 16:31:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718993266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:39,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:39,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:31:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436593] [2024-11-12 16:31:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:39,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:39,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-12 16:31:39,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:39,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:39,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-12 16:31:39,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:40,218 INFO L124 PetriNetUnfolderBase]: 5654/8603 cut-off events. [2024-11-12 16:31:40,218 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-11-12 16:31:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17259 conditions, 8603 events. 5654/8603 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53035 event pairs, 2351 based on Foata normal form. 180/7128 useless extension candidates. Maximal degree in co-relation 15373. Up to 4588 conditions per place. [2024-11-12 16:31:40,260 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 72 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-11-12 16:31:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 420 flow [2024-11-12 16:31:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-12 16:31:40,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6716417910447762 [2024-11-12 16:31:40,261 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 216 flow. Second operand 3 states and 135 transitions. [2024-11-12 16:31:40,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 420 flow [2024-11-12 16:31:40,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:31:40,264 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 220 flow [2024-11-12 16:31:40,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-11-12 16:31:40,265 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-12 16:31:40,265 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 220 flow [2024-11-12 16:31:40,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:40,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:40,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:40,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:31:40,266 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:40,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash 677378861, now seen corresponding path program 1 times [2024-11-12 16:31:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994407982] [2024-11-12 16:31:40,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:40,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:31:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994407982] [2024-11-12 16:31:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994407982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:40,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392522165] [2024-11-12 16:31:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:40,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:40,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-12 16:31:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-12 16:31:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-12 16:31:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:40,788 INFO L124 PetriNetUnfolderBase]: 5347/8363 cut-off events. [2024-11-12 16:31:40,789 INFO L125 PetriNetUnfolderBase]: For 996/996 co-relation queries the response was YES. [2024-11-12 16:31:40,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17734 conditions, 8363 events. 5347/8363 cut-off events. For 996/996 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 50219 event pairs, 2210 based on Foata normal form. 74/7419 useless extension candidates. Maximal degree in co-relation 15850. Up to 5580 conditions per place. [2024-11-12 16:31:40,818 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 70 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-12 16:31:40,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 413 flow [2024-11-12 16:31:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-12 16:31:40,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6467661691542289 [2024-11-12 16:31:40,820 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 220 flow. Second operand 3 states and 130 transitions. [2024-11-12 16:31:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 413 flow [2024-11-12 16:31:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:40,823 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 232 flow [2024-11-12 16:31:40,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-12 16:31:40,824 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-12 16:31:40,824 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 232 flow [2024-11-12 16:31:40,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-12 16:31:40,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:40,825 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:40,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:31:40,825 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:40,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1448779813, now seen corresponding path program 1 times [2024-11-12 16:31:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187924507] [2024-11-12 16:31:40,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:31:40,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:40,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187924507] [2024-11-12 16:31:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187924507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:40,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:40,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:40,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882338389] [2024-11-12 16:31:40,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:40,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:40,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:40,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-12 16:31:40,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:40,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:40,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-12 16:31:40,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:41,524 INFO L124 PetriNetUnfolderBase]: 7387/12042 cut-off events. [2024-11-12 16:31:41,524 INFO L125 PetriNetUnfolderBase]: For 2990/3001 co-relation queries the response was YES. [2024-11-12 16:31:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 12042 events. 7387/12042 cut-off events. For 2990/3001 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 82167 event pairs, 6127 based on Foata normal form. 172/10893 useless extension candidates. Maximal degree in co-relation 21869. Up to 7217 conditions per place. [2024-11-12 16:31:41,583 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 71 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-12 16:31:41,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 459 flow [2024-11-12 16:31:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-12 16:31:41,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6082089552238806 [2024-11-12 16:31:41,584 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 232 flow. Second operand 4 states and 163 transitions. [2024-11-12 16:31:41,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 459 flow [2024-11-12 16:31:41,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 448 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:41,589 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 248 flow [2024-11-12 16:31:41,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-11-12 16:31:41,590 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-12 16:31:41,590 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 248 flow [2024-11-12 16:31:41,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:41,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:41,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:41,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:31:41,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:41,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash -612879199, now seen corresponding path program 1 times [2024-11-12 16:31:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576955832] [2024-11-12 16:31:41,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:31:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576955832] [2024-11-12 16:31:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576955832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275820136] [2024-11-12 16:31:41,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:41,787 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) [2024-11-12 16:31:41,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:31:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:41,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:31:41,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:31:41,993 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:31:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275820136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:41,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:31:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-12 16:31:41,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522237331] [2024-11-12 16:31:41,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:41,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:41,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:41,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:31:42,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-12 16:31:42,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:42,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-12 16:31:42,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:42,613 INFO L124 PetriNetUnfolderBase]: 6193/10414 cut-off events. [2024-11-12 16:31:42,614 INFO L125 PetriNetUnfolderBase]: For 1612/1634 co-relation queries the response was YES. [2024-11-12 16:31:42,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21289 conditions, 10414 events. 6193/10414 cut-off events. For 1612/1634 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 72785 event pairs, 5251 based on Foata normal form. 0/9603 useless extension candidates. Maximal degree in co-relation 17587. Up to 8505 conditions per place. [2024-11-12 16:31:42,647 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-12 16:31:42,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 342 flow [2024-11-12 16:31:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-12 16:31:42,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179 [2024-11-12 16:31:42,648 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 248 flow. Second operand 4 states and 133 transitions. [2024-11-12 16:31:42,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 342 flow [2024-11-12 16:31:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:42,650 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 249 flow [2024-11-12 16:31:42,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:31:42,651 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-12 16:31:42,651 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 249 flow [2024-11-12 16:31:42,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:42,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:42,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:42,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:31:42,852 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 [2024-11-12 16:31:42,853 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:42,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash -612879200, now seen corresponding path program 1 times [2024-11-12 16:31:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:42,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150981578] [2024-11-12 16:31:42,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:42,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:31:42,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150981578] [2024-11-12 16:31:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150981578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:42,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:42,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358468560] [2024-11-12 16:31:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:42,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:42,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:42,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-12 16:31:42,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:42,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:42,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:43,449 INFO L124 PetriNetUnfolderBase]: 5205/9044 cut-off events. [2024-11-12 16:31:43,449 INFO L125 PetriNetUnfolderBase]: For 1414/1431 co-relation queries the response was YES. [2024-11-12 16:31:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17972 conditions, 9044 events. 5205/9044 cut-off events. For 1414/1431 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 64959 event pairs, 4517 based on Foata normal form. 198/8673 useless extension candidates. Maximal degree in co-relation 14265. Up to 7213 conditions per place. [2024-11-12 16:31:43,489 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-12 16:31:43,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 339 flow [2024-11-12 16:31:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-12 16:31:43,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.458955223880597 [2024-11-12 16:31:43,490 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 249 flow. Second operand 4 states and 123 transitions. [2024-11-12 16:31:43,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 339 flow [2024-11-12 16:31:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:43,493 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 241 flow [2024-11-12 16:31:43,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-11-12 16:31:43,494 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2024-11-12 16:31:43,494 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 241 flow [2024-11-12 16:31:43,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-12 16:31:43,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:43,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:43,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:31:43,495 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:43,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2004598816, now seen corresponding path program 1 times [2024-11-12 16:31:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:43,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988758949] [2024-11-12 16:31:43,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:43,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:43,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:43,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988758949] [2024-11-12 16:31:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988758949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:43,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049749518] [2024-11-12 16:31:43,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:43,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:43,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:43,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-12 16:31:43,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:43,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:43,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-12 16:31:43,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:44,259 INFO L124 PetriNetUnfolderBase]: 8061/12379 cut-off events. [2024-11-12 16:31:44,260 INFO L125 PetriNetUnfolderBase]: For 2001/2001 co-relation queries the response was YES. [2024-11-12 16:31:44,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25817 conditions, 12379 events. 8061/12379 cut-off events. For 2001/2001 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 75856 event pairs, 1483 based on Foata normal form. 430/12555 useless extension candidates. Maximal degree in co-relation 20267. Up to 6696 conditions per place. [2024-11-12 16:31:44,309 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 80 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-11-12 16:31:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 499 flow [2024-11-12 16:31:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-12 16:31:44,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2024-11-12 16:31:44,311 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 241 flow. Second operand 4 states and 150 transitions. [2024-11-12 16:31:44,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 499 flow [2024-11-12 16:31:44,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:44,314 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 256 flow [2024-11-12 16:31:44,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-11-12 16:31:44,315 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2024-11-12 16:31:44,315 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 256 flow [2024-11-12 16:31:44,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:44,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:44,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:44,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:31:44,316 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:44,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1156607850, now seen corresponding path program 2 times [2024-11-12 16:31:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067047259] [2024-11-12 16:31:44,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:44,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:44,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067047259] [2024-11-12 16:31:44,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067047259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:44,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:44,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513578910] [2024-11-12 16:31:44,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:44,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:44,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-12 16:31:44,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:44,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:44,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-12 16:31:44,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:45,264 INFO L124 PetriNetUnfolderBase]: 7864/11931 cut-off events. [2024-11-12 16:31:45,264 INFO L125 PetriNetUnfolderBase]: For 3186/3513 co-relation queries the response was YES. [2024-11-12 16:31:45,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26852 conditions, 11931 events. 7864/11931 cut-off events. For 3186/3513 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 70326 event pairs, 1763 based on Foata normal form. 599/12306 useless extension candidates. Maximal degree in co-relation 21887. Up to 7842 conditions per place. [2024-11-12 16:31:45,341 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 79 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-12 16:31:45,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 529 flow [2024-11-12 16:31:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-11-12 16:31:45,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5522388059701493 [2024-11-12 16:31:45,343 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 256 flow. Second operand 4 states and 148 transitions. [2024-11-12 16:31:45,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 529 flow [2024-11-12 16:31:45,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:45,348 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 286 flow [2024-11-12 16:31:45,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-12 16:31:45,348 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-11-12 16:31:45,349 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 286 flow [2024-11-12 16:31:45,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:45,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:45,349 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:45,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:31:45,350 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:45,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1196721288, now seen corresponding path program 3 times [2024-11-12 16:31:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367793119] [2024-11-12 16:31:45,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:45,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367793119] [2024-11-12 16:31:45,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367793119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:45,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:45,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:31:45,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104628673] [2024-11-12 16:31:45,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:45,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:45,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:31:45,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2024-11-12 16:31:45,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-12 16:31:45,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:45,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2024-11-12 16:31:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:46,799 INFO L124 PetriNetUnfolderBase]: 10490/15926 cut-off events. [2024-11-12 16:31:46,799 INFO L125 PetriNetUnfolderBase]: For 8368/8536 co-relation queries the response was YES. [2024-11-12 16:31:46,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39348 conditions, 15926 events. 10490/15926 cut-off events. For 8368/8536 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 96327 event pairs, 2376 based on Foata normal form. 454/16148 useless extension candidates. Maximal degree in co-relation 30963. Up to 8755 conditions per place. [2024-11-12 16:31:46,916 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 112 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2024-11-12 16:31:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 737 flow [2024-11-12 16:31:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:31:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:31:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-11-12 16:31:46,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5298507462686567 [2024-11-12 16:31:46,917 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 286 flow. Second operand 6 states and 213 transitions. [2024-11-12 16:31:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 737 flow [2024-11-12 16:31:46,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:46,926 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 341 flow [2024-11-12 16:31:46,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-12 16:31:46,927 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2024-11-12 16:31:46,927 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 341 flow [2024-11-12 16:31:46,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-12 16:31:46,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:46,927 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:46,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 16:31:46,927 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:46,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1006149498, now seen corresponding path program 4 times [2024-11-12 16:31:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654182748] [2024-11-12 16:31:46,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654182748] [2024-11-12 16:31:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654182748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:31:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300652215] [2024-11-12 16:31:47,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:47,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:47,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:31:47,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-12 16:31:47,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 341 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-11-12 16:31:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-12 16:31:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:48,126 INFO L124 PetriNetUnfolderBase]: 10957/17344 cut-off events. [2024-11-12 16:31:48,127 INFO L125 PetriNetUnfolderBase]: For 15361/15732 co-relation queries the response was YES. [2024-11-12 16:31:48,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44357 conditions, 17344 events. 10957/17344 cut-off events. For 15361/15732 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 114121 event pairs, 2066 based on Foata normal form. 830/17943 useless extension candidates. Maximal degree in co-relation 35515. Up to 7857 conditions per place. [2024-11-12 16:31:48,228 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 94 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-11-12 16:31:48,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 692 flow [2024-11-12 16:31:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-12 16:31:48,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5462686567164179 [2024-11-12 16:31:48,230 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 341 flow. Second operand 5 states and 183 transitions. [2024-11-12 16:31:48,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 692 flow [2024-11-12 16:31:48,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 677 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:31:48,251 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 361 flow [2024-11-12 16:31:48,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-11-12 16:31:48,251 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 21 predicate places. [2024-11-12 16:31:48,252 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 361 flow [2024-11-12 16:31:48,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-11-12 16:31:48,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:48,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:48,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:31:48,252 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:48,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash -172132478, now seen corresponding path program 5 times [2024-11-12 16:31:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241441766] [2024-11-12 16:31:48,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:48,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:48,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241441766] [2024-11-12 16:31:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241441766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:48,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:31:48,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111053837] [2024-11-12 16:31:48,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:48,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:31:48,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-12 16:31:48,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:48,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:48,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-12 16:31:48,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:49,460 INFO L124 PetriNetUnfolderBase]: 12331/19420 cut-off events. [2024-11-12 16:31:49,461 INFO L125 PetriNetUnfolderBase]: For 21648/22484 co-relation queries the response was YES. [2024-11-12 16:31:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50397 conditions, 19420 events. 12331/19420 cut-off events. For 21648/22484 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 130797 event pairs, 7710 based on Foata normal form. 381/18732 useless extension candidates. Maximal degree in co-relation 43766. Up to 11998 conditions per place. [2024-11-12 16:31:49,574 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 73 selfloop transitions, 6 changer transitions 13/111 dead transitions. [2024-11-12 16:31:49,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 677 flow [2024-11-12 16:31:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-12 16:31:49,575 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5432835820895522 [2024-11-12 16:31:49,575 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 361 flow. Second operand 5 states and 182 transitions. [2024-11-12 16:31:49,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 677 flow [2024-11-12 16:31:49,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 658 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-12 16:31:49,622 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 348 flow [2024-11-12 16:31:49,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-11-12 16:31:49,623 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2024-11-12 16:31:49,623 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 348 flow [2024-11-12 16:31:49,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:49,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:49,623 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:49,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:31:49,624 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:31:49,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -164646972, now seen corresponding path program 1 times [2024-11-12 16:31:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:49,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455446506] [2024-11-12 16:31:49,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:49,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455446506] [2024-11-12 16:31:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455446506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334128260] [2024-11-12 16:31:50,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:50,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:50,795 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) [2024-11-12 16:31:50,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:31:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:50,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 16:31:50,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:51,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:31:51,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:51,677 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 26 [2024-11-12 16:31:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:31:51,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:52,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:52,815 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 152 treesize of output 150 [2024-11-12 16:31:52,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:52,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-12 16:31:53,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:53,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 168 [2024-11-12 16:31:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:31:53,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334128260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:53,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:53,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-12 16:31:53,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819291523] [2024-11-12 16:31:53,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:53,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 16:31:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 16:31:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 16:31:54,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-12 16:31:54,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 348 flow. Second operand has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 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) [2024-11-12 16:31:54,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:54,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-12 16:31:54,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:04,095 INFO L124 PetriNetUnfolderBase]: 49481/74019 cut-off events. [2024-11-12 16:32:04,095 INFO L125 PetriNetUnfolderBase]: For 75341/79328 co-relation queries the response was YES. [2024-11-12 16:32:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197124 conditions, 74019 events. 49481/74019 cut-off events. For 75341/79328 co-relation queries the response was YES. Maximal size of possible extension queue 2575. Compared 554074 event pairs, 3849 based on Foata normal form. 990/69958 useless extension candidates. Maximal degree in co-relation 171733. Up to 9030 conditions per place. [2024-11-12 16:32:04,567 INFO L140 encePairwiseOnDemand]: 49/67 looper letters, 452 selfloop transitions, 147 changer transitions 281/898 dead transitions. [2024-11-12 16:32:04,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 898 transitions, 5609 flow [2024-11-12 16:32:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-12 16:32:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-12 16:32:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1955 transitions. [2024-11-12 16:32:04,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5210554371002132 [2024-11-12 16:32:04,574 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 348 flow. Second operand 56 states and 1955 transitions. [2024-11-12 16:32:04,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 898 transitions, 5609 flow [2024-11-12 16:32:04,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 898 transitions, 5531 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-12 16:32:04,704 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 1644 flow [2024-11-12 16:32:04,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1644, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2024-11-12 16:32:04,705 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 107 predicate places. [2024-11-12 16:32:04,705 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 1644 flow [2024-11-12 16:32:04,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 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) [2024-11-12 16:32:04,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:04,707 INFO L206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:04,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:04,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:04,908 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-12 16:32:04,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1513282800, now seen corresponding path program 2 times [2024-11-12 16:32:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:04,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383010629] [2024-11-12 16:32:04,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:04,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:06,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383010629] [2024-11-12 16:32:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383010629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276727293] [2024-11-12 16:32:06,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:32:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:06,754 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) [2024-11-12 16:32:06,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:32:06,868 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:32:06,868 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:06,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-12 16:32:06,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:06,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:32:06,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:32:06,998 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:06,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:32:07,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:32:07,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 16:32:07,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2024-11-12 16:32:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:07,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:12,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:32:12,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2024-11-12 16:32:12,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:32:12,967 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 78 treesize of output 70 [2024-11-12 16:32:12,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:32:12,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 123 [2024-11-12 16:32:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276727293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:13,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2024-11-12 16:32:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252024887] [2024-11-12 16:32:13,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:13,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-12 16:32:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-12 16:32:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1545, Unknown=5, NotChecked=0, Total=1722 [2024-11-12 16:32:17,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:32:21,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:32:23,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 67 [2024-11-12 16:32:23,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 1644 flow. Second operand has 42 states, 42 states have (on average 13.119047619047619) internal successors, (551), 42 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:23,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:23,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 67 [2024-11-12 16:32:23,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:29,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:32:37,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:32:41,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:32:45,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]