./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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-bad-buffer-mult-alt.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 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:36:13,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:36:13,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:36:13,495 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:36:13,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:36:13,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:36:13,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:36:13,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:36:13,528 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:36:13,529 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:36:13,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:36:13,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:36:13,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:36:13,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:36:13,535 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:36:13,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:36:13,535 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:36:13,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:36:13,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:36:13,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:36:13,538 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:36:13,538 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:36:13,538 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:36:13,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:36:13,539 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:36:13,539 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:36:13,539 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:36:13,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:36:13,540 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:36:13,540 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:36:13,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:36:13,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:36:13,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:36:13,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:13,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:36:13,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:36:13,542 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:36:13,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:36:13,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:36:13,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:36:13,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:36:13,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:36:13,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-17 03:36:13,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:36:13,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:36:13,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:36:13,827 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:36:13,827 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:36:13,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-17 03:36:15,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:36:15,580 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:36:15,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-17 03:36:15,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/169847844/2f8bb8fe71ed4b499426be632bbfd35e/FLAGf1ce9ae61 [2024-11-17 03:36:15,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/169847844/2f8bb8fe71ed4b499426be632bbfd35e [2024-11-17 03:36:15,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:36:15,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:36:15,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:15,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:36:15,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:36:15,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:15,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da59b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15, skipping insertion in model container [2024-11-17 03:36:15,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:15,659 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:36:15,912 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:36:15,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:15,926 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:36:15,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:15,990 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:36:15,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15 WrapperNode [2024-11-17 03:36:15,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:15,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:15,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:36:15,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:36:16,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,053 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 307 [2024-11-17 03:36:16,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:16,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:36:16,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:36:16,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:36:16,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,108 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]. [2024-11-17 03:36:16,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,127 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:36:16,139 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:36:16,139 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:36:16,139 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:36:16,143 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (1/1) ... [2024-11-17 03:36:16,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:16,188 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) [2024-11-17 03:36:16,193 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 [2024-11-17 03:36:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:36:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:36:16,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:36:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:36:16,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:36:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:36:16,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:36:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:36:16,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:36:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:36:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:36:16,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:36:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:36:16,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:36:16,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:36:16,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:36:16,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:36:16,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:36:16,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:36:16,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:36:16,253 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:36:16,414 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:36:16,417 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:36:17,024 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:36:17,025 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:36:17,390 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:36:17,391 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:36:17,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:17 BoogieIcfgContainer [2024-11-17 03:36:17,391 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:36:17,393 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:36:17,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:36:17,397 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:36:17,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:15" (1/3) ... [2024-11-17 03:36:17,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9676e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:17, skipping insertion in model container [2024-11-17 03:36:17,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:15" (2/3) ... [2024-11-17 03:36:17,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9676e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:17, skipping insertion in model container [2024-11-17 03:36:17,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:17" (3/3) ... [2024-11-17 03:36:17,399 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-17 03:36:17,416 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:36:17,417 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-17 03:36:17,417 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:36:17,496 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:36:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 196 flow [2024-11-17 03:36:17,578 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2024-11-17 03:36:17,579 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:36:17,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 12/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 193 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2024-11-17 03:36:17,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 196 flow [2024-11-17 03:36:17,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 182 flow [2024-11-17 03:36:17,599 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:36:17,605 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;@2a2a1ebe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:36:17,605 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-17 03:36:17,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:36:17,608 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:36:17,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:36:17,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:17,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:17,610 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:17,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 25466122, now seen corresponding path program 1 times [2024-11-17 03:36:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352451426] [2024-11-17 03:36:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:17,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:17,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352451426] [2024-11-17 03:36:17,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352451426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:17,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:17,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:36:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217229982] [2024-11-17 03:36:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:17,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:36:17,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:36:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:36:17,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:17,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-17 03:36:17,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:17,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:17,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:20,618 INFO L124 PetriNetUnfolderBase]: 15159/20875 cut-off events. [2024-11-17 03:36:20,619 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-11-17 03:36:20,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41566 conditions, 20875 events. 15159/20875 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 140146 event pairs, 12544 based on Foata normal form. 2616/16964 useless extension candidates. Maximal degree in co-relation 38980. Up to 19683 conditions per place. [2024-11-17 03:36:20,866 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 44 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-17 03:36:20,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 254 flow [2024-11-17 03:36:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:36:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:36:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-11-17 03:36:20,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-11-17 03:36:20,885 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 182 flow. Second operand 3 states and 139 transitions. [2024-11-17 03:36:20,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 254 flow [2024-11-17 03:36:20,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 238 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:36:20,929 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 150 flow [2024-11-17 03:36:20,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-11-17 03:36:20,937 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -10 predicate places. [2024-11-17 03:36:20,938 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 150 flow [2024-11-17 03:36:20,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2024-11-17 03:36:20,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:20,938 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:20,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:36:20,939 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:20,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 25466123, now seen corresponding path program 1 times [2024-11-17 03:36:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64329478] [2024-11-17 03:36:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64329478] [2024-11-17 03:36:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64329478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:21,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898243923] [2024-11-17 03:36:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:21,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:21,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:21,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-11-17 03:36:21,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:21,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:21,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:23,572 INFO L124 PetriNetUnfolderBase]: 15160/20880 cut-off events. [2024-11-17 03:36:23,572 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-17 03:36:23,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40929 conditions, 20880 events. 15160/20880 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 139907 event pairs, 12544 based on Foata normal form. 0/14351 useless extension candidates. Maximal degree in co-relation 40894. Up to 19692 conditions per place. [2024-11-17 03:36:23,721 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 47 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-11-17 03:36:23,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 258 flow [2024-11-17 03:36:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-11-17 03:36:23,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-17 03:36:23,726 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 150 flow. Second operand 4 states and 164 transitions. [2024-11-17 03:36:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 258 flow [2024-11-17 03:36:23,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:23,731 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 173 flow [2024-11-17 03:36:23,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-11-17 03:36:23,733 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2024-11-17 03:36:23,734 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 173 flow [2024-11-17 03:36:23,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-11-17 03:36:23,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:23,734 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:36:23,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:36:23,736 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:23,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:23,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1547112133, now seen corresponding path program 1 times [2024-11-17 03:36:23,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:23,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121073327] [2024-11-17 03:36:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121073327] [2024-11-17 03:36:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121073327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104651412] [2024-11-17 03:36:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:24,128 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) [2024-11-17 03:36:24,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:36:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:24,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:36:24,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:24,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:36:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:24,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104651412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:24,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:36:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789857585] [2024-11-17 03:36:24,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:24,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:36:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:36:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:36:24,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-17 03:36:24,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 173 flow. Second operand has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 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) [2024-11-17 03:36:24,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:24,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-17 03:36:24,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:27,318 INFO L124 PetriNetUnfolderBase]: 15160/20879 cut-off events. [2024-11-17 03:36:27,318 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-17 03:36:27,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40940 conditions, 20879 events. 15160/20879 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 140133 event pairs, 12544 based on Foata normal form. 0/14350 useless extension candidates. Maximal degree in co-relation 40915. Up to 19688 conditions per place. [2024-11-17 03:36:27,457 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 44 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-11-17 03:36:27,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 277 flow [2024-11-17 03:36:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:36:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:36:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 236 transitions. [2024-11-17 03:36:27,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-11-17 03:36:27,463 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 173 flow. Second operand 7 states and 236 transitions. [2024-11-17 03:36:27,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 277 flow [2024-11-17 03:36:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:27,466 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 184 flow [2024-11-17 03:36:27,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-11-17 03:36:27,467 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2024-11-17 03:36:27,467 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 184 flow [2024-11-17 03:36:27,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 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) [2024-11-17 03:36:27,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:27,468 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:27,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:36:27,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:27,670 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:27,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1546964343, now seen corresponding path program 1 times [2024-11-17 03:36:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688898686] [2024-11-17 03:36:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:27,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688898686] [2024-11-17 03:36:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688898686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:27,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:36:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19918818] [2024-11-17 03:36:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:27,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:27,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:27,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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) [2024-11-17 03:36:27,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:27,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:27,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:29,728 INFO L124 PetriNetUnfolderBase]: 15161/20884 cut-off events. [2024-11-17 03:36:29,729 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-17 03:36:29,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40954 conditions, 20884 events. 15161/20884 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 139802 event pairs, 12544 based on Foata normal form. 0/14356 useless extension candidates. Maximal degree in co-relation 40926. Up to 19690 conditions per place. [2024-11-17 03:36:29,823 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-17 03:36:29,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 298 flow [2024-11-17 03:36:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-17 03:36:29,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-11-17 03:36:29,825 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 184 flow. Second operand 5 states and 194 transitions. [2024-11-17 03:36:29,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 298 flow [2024-11-17 03:36:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 269 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-17 03:36:29,830 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 194 flow [2024-11-17 03:36:29,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-11-17 03:36:29,831 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-11-17 03:36:29,832 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 194 flow [2024-11-17 03:36:29,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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) [2024-11-17 03:36:29,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:29,833 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:29,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:36:29,833 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:29,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -614858223, now seen corresponding path program 1 times [2024-11-17 03:36:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:29,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986036731] [2024-11-17 03:36:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:30,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986036731] [2024-11-17 03:36:30,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986036731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:30,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019700406] [2024-11-17 03:36:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:30,096 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) [2024-11-17 03:36:30,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:36:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:30,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:36:30,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:30,206 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 [2024-11-17 03:36:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:30,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:30,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019700406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:30,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:30,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:36:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681604559] [2024-11-17 03:36:30,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:30,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:36:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:36:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:36:30,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-17 03:36:30,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 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) [2024-11-17 03:36:30,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:30,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-17 03:36:30,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:32,146 INFO L124 PetriNetUnfolderBase]: 15163/20893 cut-off events. [2024-11-17 03:36:32,147 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-17 03:36:32,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40978 conditions, 20893 events. 15163/20893 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 139938 event pairs, 12544 based on Foata normal form. 0/14366 useless extension candidates. Maximal degree in co-relation 40910. Up to 19684 conditions per place. [2024-11-17 03:36:32,449 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-11-17 03:36:32,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 350 flow [2024-11-17 03:36:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:36:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:36:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 300 transitions. [2024-11-17 03:36:32,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-11-17 03:36:32,451 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 194 flow. Second operand 9 states and 300 transitions. [2024-11-17 03:36:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 350 flow [2024-11-17 03:36:32,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:32,455 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 244 flow [2024-11-17 03:36:32,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-17 03:36:32,458 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2024-11-17 03:36:32,458 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 244 flow [2024-11-17 03:36:32,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 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) [2024-11-17 03:36:32,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:32,459 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:32,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:36:32,660 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 [2024-11-17 03:36:32,661 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:32,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1762134595, now seen corresponding path program 1 times [2024-11-17 03:36:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613429851] [2024-11-17 03:36:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:32,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613429851] [2024-11-17 03:36:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613429851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:32,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:32,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:32,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006894478] [2024-11-17 03:36:32,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:32,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:32,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:32,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:32,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:32,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:32,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:34,548 INFO L124 PetriNetUnfolderBase]: 18048/25178 cut-off events. [2024-11-17 03:36:34,549 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-17 03:36:34,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49362 conditions, 25178 events. 18048/25178 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 1550. Compared 173865 event pairs, 15126 based on Foata normal form. 608/18633 useless extension candidates. Maximal degree in co-relation 40929. Up to 19703 conditions per place. [2024-11-17 03:36:34,685 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 97 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-17 03:36:34,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 121 transitions, 578 flow [2024-11-17 03:36:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-11-17 03:36:34,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-11-17 03:36:34,687 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 244 flow. Second operand 5 states and 236 transitions. [2024-11-17 03:36:34,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 121 transitions, 578 flow [2024-11-17 03:36:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 525 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:34,690 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 257 flow [2024-11-17 03:36:34,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-17 03:36:34,691 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2024-11-17 03:36:34,691 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 257 flow [2024-11-17 03:36:34,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:34,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:34,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:34,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:36:34,692 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:34,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 62138873, now seen corresponding path program 1 times [2024-11-17 03:36:34,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:34,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310812930] [2024-11-17 03:36:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:34,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310812930] [2024-11-17 03:36:34,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310812930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:34,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:34,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:36:34,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008378824] [2024-11-17 03:36:34,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:34,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:34,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:34,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:34,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:34,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:34,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:36,226 INFO L124 PetriNetUnfolderBase]: 13245/18550 cut-off events. [2024-11-17 03:36:36,226 INFO L125 PetriNetUnfolderBase]: For 1052/1052 co-relation queries the response was YES. [2024-11-17 03:36:36,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39339 conditions, 18550 events. 13245/18550 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 124228 event pairs, 10898 based on Foata normal form. 0/13802 useless extension candidates. Maximal degree in co-relation 33105. Up to 17384 conditions per place. [2024-11-17 03:36:36,315 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 53 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-17 03:36:36,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 369 flow [2024-11-17 03:36:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-17 03:36:36,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-11-17 03:36:36,316 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 257 flow. Second operand 4 states and 158 transitions. [2024-11-17 03:36:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 369 flow [2024-11-17 03:36:36,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:36,321 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 261 flow [2024-11-17 03:36:36,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2024-11-17 03:36:36,322 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2024-11-17 03:36:36,322 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 261 flow [2024-11-17 03:36:36,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:36,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:36,322 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:36,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:36:36,322 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:36,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 62138874, now seen corresponding path program 1 times [2024-11-17 03:36:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897865037] [2024-11-17 03:36:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:36,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:36,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897865037] [2024-11-17 03:36:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897865037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:36,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:36,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:36:36,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616660065] [2024-11-17 03:36:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:36,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:36,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:36,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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) [2024-11-17 03:36:36,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:36,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:38,218 INFO L124 PetriNetUnfolderBase]: 16856/24279 cut-off events. [2024-11-17 03:36:38,219 INFO L125 PetriNetUnfolderBase]: For 1374/1374 co-relation queries the response was YES. [2024-11-17 03:36:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51309 conditions, 24279 events. 16856/24279 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 174617 event pairs, 14179 based on Foata normal form. 581/19342 useless extension candidates. Maximal degree in co-relation 43168. Up to 17407 conditions per place. [2024-11-17 03:36:38,360 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 84 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-11-17 03:36:38,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 527 flow [2024-11-17 03:36:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2024-11-17 03:36:38,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-17 03:36:38,362 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 261 flow. Second operand 5 states and 224 transitions. [2024-11-17 03:36:38,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 527 flow [2024-11-17 03:36:38,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 521 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:38,369 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 291 flow [2024-11-17 03:36:38,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2024-11-17 03:36:38,370 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-17 03:36:38,370 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 291 flow [2024-11-17 03:36:38,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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) [2024-11-17 03:36:38,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:38,371 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:38,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:36:38,371 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:38,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1169187859, now seen corresponding path program 1 times [2024-11-17 03:36:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199004469] [2024-11-17 03:36:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:38,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199004469] [2024-11-17 03:36:38,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199004469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:38,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420372536] [2024-11-17 03:36:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:38,663 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) [2024-11-17 03:36:38,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:36:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:38,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:36:38,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:38,777 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 [2024-11-17 03:36:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:36:38,884 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 [2024-11-17 03:36:38,901 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:36:38,902 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 [2024-11-17 03:36:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:38,956 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:36:38,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420372536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:38,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:36:38,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-17 03:36:38,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330685595] [2024-11-17 03:36:38,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:38,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:36:38,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:36:38,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:36:39,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2024-11-17 03:36:39,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:39,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:39,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2024-11-17 03:36:39,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:40,518 INFO L124 PetriNetUnfolderBase]: 12936/18746 cut-off events. [2024-11-17 03:36:40,518 INFO L125 PetriNetUnfolderBase]: For 2187/2187 co-relation queries the response was YES. [2024-11-17 03:36:40,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40937 conditions, 18746 events. 12936/18746 cut-off events. For 2187/2187 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 131593 event pairs, 10753 based on Foata normal form. 0/14995 useless extension candidates. Maximal degree in co-relation 32268. Up to 17299 conditions per place. [2024-11-17 03:36:40,611 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-11-17 03:36:40,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 403 flow [2024-11-17 03:36:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-17 03:36:40,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-17 03:36:40,613 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 291 flow. Second operand 4 states and 150 transitions. [2024-11-17 03:36:40,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 403 flow [2024-11-17 03:36:40,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:40,621 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 286 flow [2024-11-17 03:36:40,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-17 03:36:40,623 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-17 03:36:40,623 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 286 flow [2024-11-17 03:36:40,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:40,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:40,624 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:40,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:36:40,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:40,828 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:40,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1169187858, now seen corresponding path program 1 times [2024-11-17 03:36:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:40,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920626913] [2024-11-17 03:36:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920626913] [2024-11-17 03:36:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920626913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:40,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:40,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:40,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890112851] [2024-11-17 03:36:40,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:40,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:40,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:40,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:42,316 INFO L124 PetriNetUnfolderBase]: 9642/14095 cut-off events. [2024-11-17 03:36:42,316 INFO L125 PetriNetUnfolderBase]: For 1774/1774 co-relation queries the response was YES. [2024-11-17 03:36:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30030 conditions, 14095 events. 9642/14095 cut-off events. For 1774/1774 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 96354 event pairs, 7905 based on Foata normal form. 0/12049 useless extension candidates. Maximal degree in co-relation 21365. Up to 12955 conditions per place. [2024-11-17 03:36:42,384 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 46 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-11-17 03:36:42,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 386 flow [2024-11-17 03:36:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-17 03:36:42,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-17 03:36:42,386 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 286 flow. Second operand 5 states and 182 transitions. [2024-11-17 03:36:42,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 386 flow [2024-11-17 03:36:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:42,390 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 289 flow [2024-11-17 03:36:42,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-11-17 03:36:42,390 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2024-11-17 03:36:42,391 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 289 flow [2024-11-17 03:36:42,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 03:36:42,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:42,391 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:42,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:36:42,391 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:42,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash -413208190, now seen corresponding path program 1 times [2024-11-17 03:36:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:42,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842885878] [2024-11-17 03:36:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842885878] [2024-11-17 03:36:42,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842885878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424018556] [2024-11-17 03:36:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:42,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:42,606 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) [2024-11-17 03:36:42,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:36:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:42,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:36:42,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:42,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:36:42,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424018556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:42,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:36:42,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-17 03:36:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321219970] [2024-11-17 03:36:42,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:42,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:36:42,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:36:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:36:42,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:42,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:42,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:42,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:43,799 INFO L124 PetriNetUnfolderBase]: 7325/10917 cut-off events. [2024-11-17 03:36:43,800 INFO L125 PetriNetUnfolderBase]: For 1451/1451 co-relation queries the response was YES. [2024-11-17 03:36:43,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22644 conditions, 10917 events. 7325/10917 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 73609 event pairs, 5929 based on Foata normal form. 0/9814 useless extension candidates. Maximal degree in co-relation 16101. Up to 9905 conditions per place. [2024-11-17 03:36:43,850 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 47 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-17 03:36:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 393 flow [2024-11-17 03:36:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-17 03:36:43,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-17 03:36:43,852 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 289 flow. Second operand 5 states and 182 transitions. [2024-11-17 03:36:43,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 393 flow [2024-11-17 03:36:43,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 381 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:36:43,855 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 287 flow [2024-11-17 03:36:43,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-17 03:36:43,856 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2024-11-17 03:36:43,856 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 287 flow [2024-11-17 03:36:43,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:43,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:43,856 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:43,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:44,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:44,057 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:44,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash -331591065, now seen corresponding path program 1 times [2024-11-17 03:36:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:44,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672264097] [2024-11-17 03:36:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:44,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:44,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672264097] [2024-11-17 03:36:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672264097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:44,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:44,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:36:44,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49167403] [2024-11-17 03:36:44,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:44,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:44,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2024-11-17 03:36:44,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2024-11-17 03:36:44,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:44,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2024-11-17 03:36:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:45,201 INFO L124 PetriNetUnfolderBase]: 9348/13701 cut-off events. [2024-11-17 03:36:45,202 INFO L125 PetriNetUnfolderBase]: For 1954/1954 co-relation queries the response was YES. [2024-11-17 03:36:45,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28823 conditions, 13701 events. 9348/13701 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 86488 event pairs, 1541 based on Foata normal form. 558/14013 useless extension candidates. Maximal degree in co-relation 25104. Up to 7344 conditions per place. [2024-11-17 03:36:45,271 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 86 selfloop transitions, 6 changer transitions 4/117 dead transitions. [2024-11-17 03:36:45,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 581 flow [2024-11-17 03:36:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-11-17 03:36:45,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-11-17 03:36:45,273 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 287 flow. Second operand 5 states and 227 transitions. [2024-11-17 03:36:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 581 flow [2024-11-17 03:36:45,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 567 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:36:45,277 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 257 flow [2024-11-17 03:36:45,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-11-17 03:36:45,277 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2024-11-17 03:36:45,277 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 257 flow [2024-11-17 03:36:45,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2024-11-17 03:36:45,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:45,278 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:45,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:36:45,278 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:45,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2060202155, now seen corresponding path program 1 times [2024-11-17 03:36:45,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:45,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115897893] [2024-11-17 03:36:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:45,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:45,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115897893] [2024-11-17 03:36:45,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115897893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:45,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:45,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:36:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316726430] [2024-11-17 03:36:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:45,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:45,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2024-11-17 03:36:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2024-11-17 03:36:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2024-11-17 03:36:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:47,293 INFO L124 PetriNetUnfolderBase]: 12521/18918 cut-off events. [2024-11-17 03:36:47,293 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2024-11-17 03:36:47,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41649 conditions, 18918 events. 12521/18918 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 134717 event pairs, 1465 based on Foata normal form. 554/19301 useless extension candidates. Maximal degree in co-relation 41600. Up to 11484 conditions per place. [2024-11-17 03:36:47,429 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 100 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2024-11-17 03:36:47,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 640 flow [2024-11-17 03:36:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:36:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:36:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 272 transitions. [2024-11-17 03:36:47,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-11-17 03:36:47,431 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 257 flow. Second operand 6 states and 272 transitions. [2024-11-17 03:36:47,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 640 flow [2024-11-17 03:36:47,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 618 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:47,437 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 300 flow [2024-11-17 03:36:47,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2024-11-17 03:36:47,438 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2024-11-17 03:36:47,438 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 300 flow [2024-11-17 03:36:47,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2024-11-17 03:36:47,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:47,438 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:47,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:36:47,438 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:47,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1840173623, now seen corresponding path program 2 times [2024-11-17 03:36:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132104339] [2024-11-17 03:36:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132104339] [2024-11-17 03:36:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132104339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:47,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:36:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588959882] [2024-11-17 03:36:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:47,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:47,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:47,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2024-11-17 03:36:47,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2024-11-17 03:36:47,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:47,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2024-11-17 03:36:47,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:50,638 INFO L124 PetriNetUnfolderBase]: 26122/38933 cut-off events. [2024-11-17 03:36:50,639 INFO L125 PetriNetUnfolderBase]: For 23622/23770 co-relation queries the response was YES. [2024-11-17 03:36:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97500 conditions, 38933 events. 26122/38933 cut-off events. For 23622/23770 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 294495 event pairs, 6238 based on Foata normal form. 406/38487 useless extension candidates. Maximal degree in co-relation 97450. Up to 13625 conditions per place. [2024-11-17 03:36:51,038 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 119 selfloop transitions, 15 changer transitions 0/155 dead transitions. [2024-11-17 03:36:51,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 828 flow [2024-11-17 03:36:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:36:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:36:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-17 03:36:51,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2024-11-17 03:36:51,040 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 300 flow. Second operand 6 states and 283 transitions. [2024-11-17 03:36:51,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 828 flow [2024-11-17 03:36:51,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 818 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:51,089 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 428 flow [2024-11-17 03:36:51,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=428, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-11-17 03:36:51,090 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 16 predicate places. [2024-11-17 03:36:51,090 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 428 flow [2024-11-17 03:36:51,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2024-11-17 03:36:51,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:51,090 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2024-11-17 03:36:51,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:36:51,091 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:36:51,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:51,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1415725569, now seen corresponding path program 1 times [2024-11-17 03:36:51,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:51,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705368535] [2024-11-17 03:36:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:51,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:51,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705368535] [2024-11-17 03:36:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705368535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:51,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132793398] [2024-11-17 03:36:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:51,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:51,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:51,872 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) [2024-11-17 03:36:51,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:36:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:52,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:36:52,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:52,071 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 [2024-11-17 03:36:52,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-17 03:36:52,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-17 03:36:52,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:36:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:52,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:52,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-17 03:36:52,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-17 03:36:53,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-17 03:36:53,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-17 03:36:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:53,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132793398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:53,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:53,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-17 03:36:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965601594] [2024-11-17 03:36:53,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:53,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:36:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:36:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:36:53,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2024-11-17 03:36:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 428 flow. Second operand has 20 states, 20 states have (on average 32.45) internal successors, (649), 20 states have internal predecessors, (649), 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) [2024-11-17 03:36:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2024-11-17 03:36:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand