./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-parallel-sum-1.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/parallel-parallel-sum-1.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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:35:30,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:35:30,778 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:35:30,783 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:35:30,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:35:30,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:35:30,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:35:30,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:35:30,818 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:35:30,820 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:35:30,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:35:30,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:35:30,821 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:35:30,823 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:35:30,823 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:35:30,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:35:30,824 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:35:30,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:35:30,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:35:30,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:35:30,828 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:35:30,828 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:35:30,828 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:35:30,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:35:30,829 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:35:30,829 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:35:30,829 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:35:30,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:35:30,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:35:30,830 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:35:30,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:35:30,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:35:30,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:35:30,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:30,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:35:30,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:35:30,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:35:30,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:35:30,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:35:30,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:35:30,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:35:30,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:35:30,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2024-11-17 03:35:31,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:35:31,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:35:31,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:35:31,111 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:35:31,111 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:35:31,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-11-17 03:35:32,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:35:32,772 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:35:32,773 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-11-17 03:35:32,783 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6eff318/32cb4f6e4c454e5f92f555516f2d2f8f/FLAG034de9622 [2024-11-17 03:35:32,796 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6eff318/32cb4f6e4c454e5f92f555516f2d2f8f [2024-11-17 03:35:32,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:35:32,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:35:32,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:32,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:35:32,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:35:32,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:32" (1/1) ... [2024-11-17 03:35:32,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2399004c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:32, skipping insertion in model container [2024-11-17 03:35:32,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:32" (1/1) ... [2024-11-17 03:35:32,836 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:35:33,063 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 03:35:33,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:33,088 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:35:33,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:35:33,150 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:35:33,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33 WrapperNode [2024-11-17 03:35:33,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:35:33,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:33,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:35:33,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:35:33,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,174 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,216 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 292 [2024-11-17 03:35:33,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:35:33,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:35:33,219 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:35:33,219 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:35:33,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,260 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:35:33,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,274 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:35:33,283 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:35:33,283 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:35:33,283 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:35:33,284 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (1/1) ... [2024-11-17 03:35:33,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:35:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:33,321 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 03:35:33,325 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 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:35:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:35:33,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:35:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:35:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:35:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:35:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:35:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:35:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:35:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:35:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:35:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:35:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:35:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:35:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:35:33,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:35:33,368 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 03:35:33,487 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:35:33,489 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:35:33,949 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:35:33,949 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:35:34,311 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:35:34,312 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:35:34,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:34 BoogieIcfgContainer [2024-11-17 03:35:34,313 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:35:34,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:35:34,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:35:34,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:35:34,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:35:32" (1/3) ... [2024-11-17 03:35:34,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d6ff84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:34, skipping insertion in model container [2024-11-17 03:35:34,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:33" (2/3) ... [2024-11-17 03:35:34,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d6ff84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:34, skipping insertion in model container [2024-11-17 03:35:34,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:35:34" (3/3) ... [2024-11-17 03:35:34,323 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2024-11-17 03:35:34,341 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:35:34,342 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-17 03:35:34,342 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:35:34,418 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:35:34,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 168 flow [2024-11-17 03:35:34,497 INFO L124 PetriNetUnfolderBase]: 10/66 cut-off events. [2024-11-17 03:35:34,497 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:35:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 66 events. 10/66 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-17 03:35:34,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 168 flow [2024-11-17 03:35:34,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 65 transitions, 154 flow [2024-11-17 03:35:34,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:35:34,520 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;@b3f9974, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:35:34,520 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-17 03:35:34,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:35:34,525 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:35:34,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:35:34,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:34,526 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:35:34,527 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:34,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash 24994324, now seen corresponding path program 1 times [2024-11-17 03:35:34,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946729101] [2024-11-17 03:35:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:34,871 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 03:35:34,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946729101] [2024-11-17 03:35:34,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946729101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:34,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:34,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:35:34,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138353598] [2024-11-17 03:35:34,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:34,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:35:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:35:34,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:35:34,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:35:34,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:35:34,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:34,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:35:34,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:41,063 INFO L124 PetriNetUnfolderBase]: 52585/68173 cut-off events. [2024-11-17 03:35:41,064 INFO L125 PetriNetUnfolderBase]: For 2931/2931 co-relation queries the response was YES. [2024-11-17 03:35:41,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138725 conditions, 68173 events. 52585/68173 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 2690. Compared 379368 event pairs, 45974 based on Foata normal form. 2/48219 useless extension candidates. Maximal degree in co-relation 131525. Up to 68084 conditions per place. [2024-11-17 03:35:41,548 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-17 03:35:41,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 236 flow [2024-11-17 03:35:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:35:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:35:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-17 03:35:41,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-11-17 03:35:41,564 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 154 flow. Second operand 3 states and 95 transitions. [2024-11-17 03:35:41,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 236 flow [2024-11-17 03:35:41,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:35:41,713 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 126 flow [2024-11-17 03:35:41,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-11-17 03:35:41,723 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-11-17 03:35:41,724 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 126 flow [2024-11-17 03:35:41,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:35:41,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:41,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:35:41,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:35:41,728 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:41,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 24994325, now seen corresponding path program 1 times [2024-11-17 03:35:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:41,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367663650] [2024-11-17 03:35:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:42,079 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 03:35:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:42,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367663650] [2024-11-17 03:35:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367663650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:42,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:35:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721675017] [2024-11-17 03:35:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:42,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:42,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:42,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:42,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:35:42,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 03:35:42,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:42,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:35:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:46,781 INFO L124 PetriNetUnfolderBase]: 52586/68178 cut-off events. [2024-11-17 03:35:46,782 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2024-11-17 03:35:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137094 conditions, 68178 events. 52586/68178 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 2690. Compared 379511 event pairs, 45974 based on Foata normal form. 0/48221 useless extension candidates. Maximal degree in co-relation 137068. Up to 68089 conditions per place. [2024-11-17 03:35:47,121 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-17 03:35:47,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 240 flow [2024-11-17 03:35:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-17 03:35:47,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-11-17 03:35:47,124 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 126 flow. Second operand 4 states and 106 transitions. [2024-11-17 03:35:47,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 240 flow [2024-11-17 03:35:47,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:47,128 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 149 flow [2024-11-17 03:35:47,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-11-17 03:35:47,130 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-11-17 03:35:47,130 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 149 flow [2024-11-17 03:35:47,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 03:35:47,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:47,131 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:35:47,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:35:47,132 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:47,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1577368109, now seen corresponding path program 1 times [2024-11-17 03:35:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298636667] [2024-11-17 03:35:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:47,454 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 03:35:47,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298636667] [2024-11-17 03:35:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298636667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594312329] [2024-11-17 03:35:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:47,459 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 03:35:47,461 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 03:35:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:47,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:35:47,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:47,652 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 03:35:47,818 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 03:35:47,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:47,938 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 03:35:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594312329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:47,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:35:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271217589] [2024-11-17 03:35:47,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:47,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:35:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:35:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:35:47,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 70 [2024-11-17 03:35:47,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 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 03:35:47,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:47,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 70 [2024-11-17 03:35:47,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:51,789 INFO L124 PetriNetUnfolderBase]: 52587/68182 cut-off events. [2024-11-17 03:35:51,789 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2024-11-17 03:35:51,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137115 conditions, 68182 events. 52587/68182 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 2690. Compared 379504 event pairs, 45974 based on Foata normal form. 0/48226 useless extension candidates. Maximal degree in co-relation 137078. Up to 68086 conditions per place. [2024-11-17 03:35:52,122 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-11-17 03:35:52,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 277 flow [2024-11-17 03:35:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:35:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:35:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-17 03:35:52,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2785714285714286 [2024-11-17 03:35:52,125 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 149 flow. Second operand 8 states and 156 transitions. [2024-11-17 03:35:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 277 flow [2024-11-17 03:35:52,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:35:52,127 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 174 flow [2024-11-17 03:35:52,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-17 03:35:52,128 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-17 03:35:52,128 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 174 flow [2024-11-17 03:35:52,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 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 03:35:52,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:52,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:52,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:35:52,333 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 03:35:52,334 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:52,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2016320957, now seen corresponding path program 1 times [2024-11-17 03:35:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028149879] [2024-11-17 03:35:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:52,415 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 03:35:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:52,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028149879] [2024-11-17 03:35:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028149879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:52,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:52,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:35:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444881284] [2024-11-17 03:35:52,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:52,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:35:52,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:35:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:35:52,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:35:52,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 03:35:52,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:52,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:35:52,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:54,847 INFO L124 PetriNetUnfolderBase]: 33334/43294 cut-off events. [2024-11-17 03:35:54,848 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2024-11-17 03:35:54,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87117 conditions, 43294 events. 33334/43294 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 229358 event pairs, 28616 based on Foata normal form. 0/33752 useless extension candidates. Maximal degree in co-relation 87075. Up to 43205 conditions per place. [2024-11-17 03:35:55,021 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 47 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-17 03:35:55,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 268 flow [2024-11-17 03:35:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:35:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:35:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-17 03:35:55,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3607142857142857 [2024-11-17 03:35:55,023 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 174 flow. Second operand 4 states and 101 transitions. [2024-11-17 03:35:55,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 268 flow [2024-11-17 03:35:55,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 236 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-17 03:35:55,025 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-11-17 03:35:55,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-17 03:35:55,026 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2024-11-17 03:35:55,026 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-11-17 03:35:55,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 03:35:55,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:55,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:55,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:35:55,027 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:55,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2016320958, now seen corresponding path program 1 times [2024-11-17 03:35:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:55,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472413100] [2024-11-17 03:35:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:55,096 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 03:35:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472413100] [2024-11-17 03:35:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472413100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:35:55,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:35:55,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:35:55,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550699640] [2024-11-17 03:35:55,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:35:55,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:35:55,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:35:55,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:35:55,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:35:55,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 03:35:55,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:55,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:35:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:35:58,304 INFO L124 PetriNetUnfolderBase]: 45013/59030 cut-off events. [2024-11-17 03:35:58,305 INFO L125 PetriNetUnfolderBase]: For 734/734 co-relation queries the response was YES. [2024-11-17 03:35:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118703 conditions, 59030 events. 45013/59030 cut-off events. For 734/734 co-relation queries the response was YES. Maximal size of possible extension queue 2092. Compared 331126 event pairs, 39355 based on Foata normal form. 1507/47748 useless extension candidates. Maximal degree in co-relation 86609. Up to 42957 conditions per place. [2024-11-17 03:35:58,629 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 82 selfloop transitions, 4 changer transitions 1/93 dead transitions. [2024-11-17 03:35:58,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 93 transitions, 394 flow [2024-11-17 03:35:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:35:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:35:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-17 03:35:58,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-11-17 03:35:58,631 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 5 states and 154 transitions. [2024-11-17 03:35:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 93 transitions, 394 flow [2024-11-17 03:35:58,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:35:58,634 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 163 flow [2024-11-17 03:35:58,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-11-17 03:35:58,635 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-17 03:35:58,635 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 163 flow [2024-11-17 03:35:58,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 03:35:58,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:35:58,636 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:35:58,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:35:58,636 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:35:58,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:35:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash 728929446, now seen corresponding path program 1 times [2024-11-17 03:35:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:35:58,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008983342] [2024-11-17 03:35:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:58,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:35:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:58,739 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 03:35:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:35:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008983342] [2024-11-17 03:35:58,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008983342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:35:58,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438374652] [2024-11-17 03:35:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:35:58,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:35:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:35:58,743 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 03:35:58,744 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 03:35:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:35:58,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 03:35:58,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:35:58,895 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 03:35:58,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:35:58,947 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 03:35:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438374652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:35:58,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:35:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-17 03:35:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254269893] [2024-11-17 03:35:58,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:35:58,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:35:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:35:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:35:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:35:58,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:35:58,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 163 flow. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 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 03:35:58,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:35:58,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:35:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:03,228 INFO L124 PetriNetUnfolderBase]: 56893/74969 cut-off events. [2024-11-17 03:36:03,229 INFO L125 PetriNetUnfolderBase]: For 4807/4807 co-relation queries the response was YES. [2024-11-17 03:36:03,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155511 conditions, 74969 events. 56893/74969 cut-off events. For 4807/4807 co-relation queries the response was YES. Maximal size of possible extension queue 2217. Compared 433502 event pairs, 50289 based on Foata normal form. 1506/60215 useless extension candidates. Maximal degree in co-relation 123432. Up to 42951 conditions per place. [2024-11-17 03:36:03,562 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 79 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-11-17 03:36:03,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 425 flow [2024-11-17 03:36:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:36:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:36:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-11-17 03:36:03,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-17 03:36:03,564 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 163 flow. Second operand 9 states and 210 transitions. [2024-11-17 03:36:03,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 425 flow [2024-11-17 03:36:03,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:03,570 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 211 flow [2024-11-17 03:36:03,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=211, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-11-17 03:36:03,571 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2024-11-17 03:36:03,571 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 211 flow [2024-11-17 03:36:03,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 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 03:36:03,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:03,572 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:03,592 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 03:36:03,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-17 03:36:03,776 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:36:03,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1897603028, now seen corresponding path program 1 times [2024-11-17 03:36:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:03,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82186174] [2024-11-17 03:36:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:03,885 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 03:36:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82186174] [2024-11-17 03:36:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82186174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:36:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628036843] [2024-11-17 03:36:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:03,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:03,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2024-11-17 03:36:03,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 03:36:03,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:03,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2024-11-17 03:36:03,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:07,664 INFO L124 PetriNetUnfolderBase]: 49653/65440 cut-off events. [2024-11-17 03:36:07,664 INFO L125 PetriNetUnfolderBase]: For 7629/7629 co-relation queries the response was YES. [2024-11-17 03:36:07,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141230 conditions, 65440 events. 49653/65440 cut-off events. For 7629/7629 co-relation queries the response was YES. Maximal size of possible extension queue 2127. Compared 373396 event pairs, 43982 based on Foata normal form. 611/51959 useless extension candidates. Maximal degree in co-relation 96743. Up to 59131 conditions per place. [2024-11-17 03:36:07,976 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 51 selfloop transitions, 2 changer transitions 30/89 dead transitions. [2024-11-17 03:36:07,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 441 flow [2024-11-17 03:36:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-17 03:36:07,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-17 03:36:07,977 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 211 flow. Second operand 5 states and 147 transitions. [2024-11-17 03:36:07,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 441 flow [2024-11-17 03:36:07,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 432 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:36:07,988 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 200 flow [2024-11-17 03:36:07,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-17 03:36:07,989 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2024-11-17 03:36:07,989 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 200 flow [2024-11-17 03:36:07,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 03:36:07,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:07,989 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:07,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:36:07,990 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:36:07,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2106348734, now seen corresponding path program 2 times [2024-11-17 03:36:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:07,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573538545] [2024-11-17 03:36:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:07,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:36:08,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:08,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573538545] [2024-11-17 03:36:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573538545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984983397] [2024-11-17 03:36:08,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:36:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:08,194 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 03:36:08,199 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 03:36:08,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:36:08,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:08,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:36:08,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:08,294 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 12 treesize of output 11 [2024-11-17 03:36:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:36:08,508 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:36:08,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984983397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:08,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:36:08,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2024-11-17 03:36:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876626802] [2024-11-17 03:36:08,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:08,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:08,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:36:08,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 70 [2024-11-17 03:36:08,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 03:36:08,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:08,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 70 [2024-11-17 03:36:08,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:12,951 INFO L124 PetriNetUnfolderBase]: 58455/76383 cut-off events. [2024-11-17 03:36:12,952 INFO L125 PetriNetUnfolderBase]: For 12228/12228 co-relation queries the response was YES. [2024-11-17 03:36:13,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174712 conditions, 76383 events. 58455/76383 cut-off events. For 12228/12228 co-relation queries the response was YES. Maximal size of possible extension queue 2338. Compared 440305 event pairs, 23496 based on Foata normal form. 0/60063 useless extension candidates. Maximal degree in co-relation 174688. Up to 44491 conditions per place. [2024-11-17 03:36:13,488 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 82 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2024-11-17 03:36:13,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 474 flow [2024-11-17 03:36:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-17 03:36:13,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-11-17 03:36:13,490 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 200 flow. Second operand 4 states and 139 transitions. [2024-11-17 03:36:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 474 flow [2024-11-17 03:36:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 462 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-17 03:36:13,522 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 224 flow [2024-11-17 03:36:13,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-17 03:36:13,523 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2024-11-17 03:36:13,523 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 224 flow [2024-11-17 03:36:13,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 03:36:13,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:13,524 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:13,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:13,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:13,725 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:36:13,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1647927996, now seen corresponding path program 1 times [2024-11-17 03:36:13,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:13,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133435831] [2024-11-17 03:36:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:13,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:13,854 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 03:36:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133435831] [2024-11-17 03:36:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133435831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624812662] [2024-11-17 03:36:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:13,857 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 03:36:13,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process