./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-symm.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/chl-node-symm.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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:02,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:02,270 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:02,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:02,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:02,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:02,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:02,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:02,293 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:02,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:02,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:02,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:02,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:02,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:02,295 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:02,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:02,296 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:02,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:02,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:02,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:02,297 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:02,297 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:02,298 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:02,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:02,300 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:02,300 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:02,301 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:02,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:02,301 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:02,301 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:02,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:02,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:02,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:02,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:02,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:02,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:02,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:02,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:02,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:02,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:02,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:02,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:02,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-11-17 03:33:02,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:02,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:02,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:02,561 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:02,562 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:02,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-17 03:33:03,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:04,006 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:04,006 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-17 03:33:04,012 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7845ffa1a/90fe11a4d1a7474cb62193b321737ecf/FLAG815047622 [2024-11-17 03:33:04,415 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7845ffa1a/90fe11a4d1a7474cb62193b321737ecf [2024-11-17 03:33:04,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:04,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:04,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:04,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:04,429 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:04,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5feee071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04, skipping insertion in model container [2024-11-17 03:33:04,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,451 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:04,586 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 03:33:04,592 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 03:33:04,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:04,602 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:04,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:04,637 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:04,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04 WrapperNode [2024-11-17 03:33:04,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:04,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:04,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:04,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:04,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,706 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 287 [2024-11-17 03:33:04,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:04,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:04,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:04,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:04,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,722 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,741 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 10, 6]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-17 03:33:04,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,749 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,753 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:04,756 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:04,756 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:04,756 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:04,757 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:04,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:04,783 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 03:33:04,788 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 03:33:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:04,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:04,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:04,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:33:04,827 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 03:33:04,944 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:04,951 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:05,441 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:05,441 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:05,907 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:05,908 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:05,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:05 BoogieIcfgContainer [2024-11-17 03:33:05,910 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:05,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:05,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:05,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:05,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:04" (1/3) ... [2024-11-17 03:33:05,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6de5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:05, skipping insertion in model container [2024-11-17 03:33:05,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (2/3) ... [2024-11-17 03:33:05,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6de5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:05, skipping insertion in model container [2024-11-17 03:33:05,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:05" (3/3) ... [2024-11-17 03:33:05,920 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2024-11-17 03:33:05,948 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:05,948 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-17 03:33:05,948 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:06,002 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:33:06,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 94 transitions, 202 flow [2024-11-17 03:33:06,098 INFO L124 PetriNetUnfolderBase]: 12/92 cut-off events. [2024-11-17 03:33:06,098 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:33:06,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 12/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-11-17 03:33:06,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 94 transitions, 202 flow [2024-11-17 03:33:06,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 91 transitions, 194 flow [2024-11-17 03:33:06,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:06,131 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;@44abef34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:06,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-17 03:33:06,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:06,142 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:06,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:06,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:06,143 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:06,147 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:06,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash 26331411, now seen corresponding path program 1 times [2024-11-17 03:33:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:06,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575693023] [2024-11-17 03:33:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:06,451 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 03:33:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575693023] [2024-11-17 03:33:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575693023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360792021] [2024-11-17 03:33:06,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:06,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:06,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2024-11-17 03:33:06,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2024-11-17 03:33:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:06,772 INFO L124 PetriNetUnfolderBase]: 192/588 cut-off events. [2024-11-17 03:33:06,772 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:33:06,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 588 events. 192/588 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3491 event pairs, 113 based on Foata normal form. 5/440 useless extension candidates. Maximal degree in co-relation 827. Up to 301 conditions per place. [2024-11-17 03:33:06,779 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 32 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-17 03:33:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 246 flow [2024-11-17 03:33:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2024-11-17 03:33:06,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6985815602836879 [2024-11-17 03:33:06,792 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 194 flow. Second operand 3 states and 197 transitions. [2024-11-17 03:33:06,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 246 flow [2024-11-17 03:33:06,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:06,799 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 174 flow [2024-11-17 03:33:06,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-11-17 03:33:06,805 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -6 predicate places. [2024-11-17 03:33:06,805 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 174 flow [2024-11-17 03:33:06,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:06,806 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:06,806 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:06,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:06,807 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:06,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:06,808 INFO L85 PathProgramCache]: Analyzing trace with hash 26331412, now seen corresponding path program 1 times [2024-11-17 03:33:06,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:06,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237115735] [2024-11-17 03:33:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:07,099 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 03:33:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237115735] [2024-11-17 03:33:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237115735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:07,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533829174] [2024-11-17 03:33:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:07,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:07,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:07,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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 03:33:07,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:07,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:07,300 INFO L124 PetriNetUnfolderBase]: 192/591 cut-off events. [2024-11-17 03:33:07,300 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:33:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 591 events. 192/591 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3495 event pairs, 113 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 881. Up to 311 conditions per place. [2024-11-17 03:33:07,308 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 38 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-17 03:33:07,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 258 flow [2024-11-17 03:33:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2024-11-17 03:33:07,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-11-17 03:33:07,312 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 174 flow. Second operand 3 states and 192 transitions. [2024-11-17 03:33:07,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 258 flow [2024-11-17 03:33:07,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:07,315 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 184 flow [2024-11-17 03:33:07,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-11-17 03:33:07,316 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-17 03:33:07,319 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 184 flow [2024-11-17 03:33:07,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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 03:33:07,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:07,319 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:07,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:07,320 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:07,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1539119751, now seen corresponding path program 1 times [2024-11-17 03:33:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823217092] [2024-11-17 03:33:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:07,617 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 03:33:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823217092] [2024-11-17 03:33:07,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823217092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32533040] [2024-11-17 03:33:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:07,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:07,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:07,621 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 03:33:07,622 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 03:33:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:07,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:33:07,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:07,756 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 03:33:07,906 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 03:33:07,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:08,064 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 03:33:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32533040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:08,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:33:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688663444] [2024-11-17 03:33:08,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:08,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:33:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:33:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:33:08,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 184 flow. Second operand has 11 states, 11 states have (on average 51.36363636363637) internal successors, (565), 11 states have internal predecessors, (565), 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 03:33:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:09,110 INFO L124 PetriNetUnfolderBase]: 192/590 cut-off events. [2024-11-17 03:33:09,113 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:09,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 590 events. 192/590 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3495 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 903. Up to 305 conditions per place. [2024-11-17 03:33:09,121 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 32 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-17 03:33:09,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 260 flow [2024-11-17 03:33:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:33:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:33:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2024-11-17 03:33:09,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-11-17 03:33:09,123 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 184 flow. Second operand 6 states and 340 transitions. [2024-11-17 03:33:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 260 flow [2024-11-17 03:33:09,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:09,127 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 200 flow [2024-11-17 03:33:09,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-11-17 03:33:09,130 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -1 predicate places. [2024-11-17 03:33:09,130 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 200 flow [2024-11-17 03:33:09,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.36363636363637) internal successors, (565), 11 states have internal predecessors, (565), 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 03:33:09,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:09,134 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:09,150 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 03:33:09,335 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 03:33:09,336 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:09,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1154648100, now seen corresponding path program 1 times [2024-11-17 03:33:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242396231] [2024-11-17 03:33:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:09,503 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 03:33:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242396231] [2024-11-17 03:33:09,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242396231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:09,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:09,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336750666] [2024-11-17 03:33:09,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:09,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:09,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:09,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:09,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:09,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:09,705 INFO L124 PetriNetUnfolderBase]: 192/593 cut-off events. [2024-11-17 03:33:09,706 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:33:09,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 593 events. 192/593 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3491 event pairs, 113 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 903. Up to 309 conditions per place. [2024-11-17 03:33:09,709 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 37 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-11-17 03:33:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 286 flow [2024-11-17 03:33:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2024-11-17 03:33:09,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462765957446809 [2024-11-17 03:33:09,712 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 200 flow. Second operand 4 states and 243 transitions. [2024-11-17 03:33:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 286 flow [2024-11-17 03:33:09,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 276 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:09,715 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 210 flow [2024-11-17 03:33:09,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-11-17 03:33:09,716 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 0 predicate places. [2024-11-17 03:33:09,717 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 210 flow [2024-11-17 03:33:09,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:09,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:09,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:09,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:33:09,718 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:09,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -270692281, now seen corresponding path program 1 times [2024-11-17 03:33:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115028115] [2024-11-17 03:33:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115028115] [2024-11-17 03:33:09,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115028115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41006940] [2024-11-17 03:33:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:09,932 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 03:33:09,933 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 03:33:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:10,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:10,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:10,039 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 03:33:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:10,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41006940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:10,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:33:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930523344] [2024-11-17 03:33:10,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:10,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:33:10,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:33:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:11,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:11,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 51.76923076923077) internal successors, (673), 13 states have internal predecessors, (673), 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 03:33:11,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:11,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:11,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:11,485 INFO L124 PetriNetUnfolderBase]: 194/602 cut-off events. [2024-11-17 03:33:11,485 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:33:11,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 602 events. 194/602 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3520 event pairs, 113 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 914. Up to 301 conditions per place. [2024-11-17 03:33:11,488 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 32 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-11-17 03:33:11,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 337 flow [2024-11-17 03:33:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:33:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:33:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 500 transitions. [2024-11-17 03:33:11,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5910165484633569 [2024-11-17 03:33:11,490 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 210 flow. Second operand 9 states and 500 transitions. [2024-11-17 03:33:11,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 337 flow [2024-11-17 03:33:11,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:11,492 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 260 flow [2024-11-17 03:33:11,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-11-17 03:33:11,493 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-11-17 03:33:11,493 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 260 flow [2024-11-17 03:33:11,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.76923076923077) internal successors, (673), 13 states have internal predecessors, (673), 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 03:33:11,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:11,494 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:11,507 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 03:33:11,697 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 03:33:11,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:11,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1754105702, now seen corresponding path program 1 times [2024-11-17 03:33:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:11,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551025219] [2024-11-17 03:33:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:11,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551025219] [2024-11-17 03:33:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551025219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:11,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:11,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:11,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130921014] [2024-11-17 03:33:11,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:11,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:11,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:11,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:11,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:11,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2024-11-17 03:33:11,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 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 03:33:11,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:11,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2024-11-17 03:33:11,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:11,864 INFO L124 PetriNetUnfolderBase]: 194/600 cut-off events. [2024-11-17 03:33:11,864 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-17 03:33:11,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 600 events. 194/600 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3519 event pairs, 113 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 918. Up to 310 conditions per place. [2024-11-17 03:33:11,868 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2024-11-17 03:33:11,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 344 flow [2024-11-17 03:33:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2024-11-17 03:33:11,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-11-17 03:33:11,869 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 260 flow. Second operand 3 states and 192 transitions. [2024-11-17 03:33:11,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 344 flow [2024-11-17 03:33:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 334 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:11,873 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 252 flow [2024-11-17 03:33:11,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-11-17 03:33:11,874 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2024-11-17 03:33:11,875 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 252 flow [2024-11-17 03:33:11,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 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 03:33:11,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:11,875 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:11,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:33:11,875 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:11,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1754105703, now seen corresponding path program 1 times [2024-11-17 03:33:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:11,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617075836] [2024-11-17 03:33:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617075836] [2024-11-17 03:33:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617075836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672403504] [2024-11-17 03:33:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:12,093 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 03:33:12,095 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 03:33:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:33:12,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:12,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-17 03:33:12,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 3 [2024-11-17 03:33:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:12,286 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:12,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672403504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:12,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:12,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2024-11-17 03:33:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645969431] [2024-11-17 03:33:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:12,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:33:12,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2024-11-17 03:33:12,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 03:33:12,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:12,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2024-11-17 03:33:12,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:12,460 INFO L124 PetriNetUnfolderBase]: 195/605 cut-off events. [2024-11-17 03:33:12,460 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-17 03:33:12,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 605 events. 195/605 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3515 event pairs, 113 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 928. Up to 318 conditions per place. [2024-11-17 03:33:12,463 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 44 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2024-11-17 03:33:12,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 356 flow [2024-11-17 03:33:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-11-17 03:33:12,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-11-17 03:33:12,465 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 252 flow. Second operand 4 states and 248 transitions. [2024-11-17 03:33:12,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 356 flow [2024-11-17 03:33:12,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:12,467 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 270 flow [2024-11-17 03:33:12,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-11-17 03:33:12,467 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-11-17 03:33:12,468 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 270 flow [2024-11-17 03:33:12,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 03:33:12,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:12,468 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:12,483 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 03:33:12,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,673 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:12,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash -303216559, now seen corresponding path program 1 times [2024-11-17 03:33:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89557255] [2024-11-17 03:33:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89557255] [2024-11-17 03:33:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89557255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634161587] [2024-11-17 03:33:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:12,872 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 03:33:12,874 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 03:33:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:12,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:13,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:13,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634161587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:13,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:13,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:33:13,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262615611] [2024-11-17 03:33:13,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:13,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:13,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:13,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:13,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 51.92857142857143) internal successors, (727), 14 states have internal predecessors, (727), 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 03:33:13,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:13,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:13,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:13,595 INFO L124 PetriNetUnfolderBase]: 379/1164 cut-off events. [2024-11-17 03:33:13,595 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-17 03:33:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 1164 events. 379/1164 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8176 event pairs, 225 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 930. Up to 307 conditions per place. [2024-11-17 03:33:13,601 INFO L140 encePairwiseOnDemand]: 80/94 looper letters, 65 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-11-17 03:33:13,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 132 transitions, 573 flow [2024-11-17 03:33:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:33:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:33:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 680 transitions. [2024-11-17 03:33:13,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-11-17 03:33:13,603 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 270 flow. Second operand 12 states and 680 transitions. [2024-11-17 03:33:13,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 132 transitions, 573 flow [2024-11-17 03:33:13,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:13,608 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 440 flow [2024-11-17 03:33:13,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=440, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-17 03:33:13,610 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2024-11-17 03:33:13,610 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 440 flow [2024-11-17 03:33:13,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.92857142857143) internal successors, (727), 14 states have internal predecessors, (727), 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 03:33:13,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:13,611 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:13,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:33:13,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:13,812 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:13,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash -302674137, now seen corresponding path program 1 times [2024-11-17 03:33:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:13,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773072488] [2024-11-17 03:33:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:13,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:13,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773072488] [2024-11-17 03:33:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773072488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:13,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:13,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:33:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679262551] [2024-11-17 03:33:13,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:13,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:13,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2024-11-17 03:33:13,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 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 03:33:13,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:13,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2024-11-17 03:33:13,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:14,102 INFO L124 PetriNetUnfolderBase]: 384/1189 cut-off events. [2024-11-17 03:33:14,103 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-17 03:33:14,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1954 conditions, 1189 events. 384/1189 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8389 event pairs, 226 based on Foata normal form. 2/889 useless extension candidates. Maximal degree in co-relation 951. Up to 616 conditions per place. [2024-11-17 03:33:14,108 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 52 selfloop transitions, 9 changer transitions 0/105 dead transitions. [2024-11-17 03:33:14,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 105 transitions, 547 flow [2024-11-17 03:33:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:33:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:33:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2024-11-17 03:33:14,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6361702127659574 [2024-11-17 03:33:14,110 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 440 flow. Second operand 5 states and 299 transitions. [2024-11-17 03:33:14,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 105 transitions, 547 flow [2024-11-17 03:33:14,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 105 transitions, 539 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:14,112 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 439 flow [2024-11-17 03:33:14,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=439, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2024-11-17 03:33:14,113 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 23 predicate places. [2024-11-17 03:33:14,113 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 439 flow [2024-11-17 03:33:14,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 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 03:33:14,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:14,114 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:14,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:33:14,114 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:14,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1710044492, now seen corresponding path program 2 times [2024-11-17 03:33:14,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:14,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998061194] [2024-11-17 03:33:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:14,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998061194] [2024-11-17 03:33:14,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998061194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:14,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747203788] [2024-11-17 03:33:14,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:14,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:14,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:14,346 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 03:33:14,349 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 03:33:14,434 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:14,434 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:14,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:33:14,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:14,475 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 03:33:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:33:14,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:33:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747203788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:14,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:14,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-17 03:33:14,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779884902] [2024-11-17 03:33:14,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:14,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:33:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:33:14,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:33:16,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-17 03:33:16,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 439 flow. Second operand has 18 states, 18 states have (on average 50.27777777777778) internal successors, (905), 18 states have internal predecessors, (905), 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 03:33:16,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:16,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-17 03:33:16,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:16,893 INFO L124 PetriNetUnfolderBase]: 574/1778 cut-off events. [2024-11-17 03:33:16,894 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2024-11-17 03:33:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1778 events. 574/1778 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13569 event pairs, 338 based on Foata normal form. 1/1340 useless extension candidates. Maximal degree in co-relation 999. Up to 623 conditions per place. [2024-11-17 03:33:16,906 INFO L140 encePairwiseOnDemand]: 81/94 looper letters, 87 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-11-17 03:33:16,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 169 transitions, 1002 flow [2024-11-17 03:33:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-17 03:33:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-17 03:33:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1218 transitions. [2024-11-17 03:33:16,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5633672525439408 [2024-11-17 03:33:16,909 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 439 flow. Second operand 23 states and 1218 transitions. [2024-11-17 03:33:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 169 transitions, 1002 flow [2024-11-17 03:33:16,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 169 transitions, 976 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:16,913 INFO L231 Difference]: Finished difference. Result has 135 places, 136 transitions, 735 flow [2024-11-17 03:33:16,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=735, PETRI_PLACES=135, PETRI_TRANSITIONS=136} [2024-11-17 03:33:16,914 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 49 predicate places. [2024-11-17 03:33:16,914 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 136 transitions, 735 flow [2024-11-17 03:33:16,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 50.27777777777778) internal successors, (905), 18 states have internal predecessors, (905), 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 03:33:16,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:16,915 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:16,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:33:17,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-17 03:33:17,123 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:17,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash -806867459, now seen corresponding path program 1 times [2024-11-17 03:33:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79798958] [2024-11-17 03:33:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:17,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79798958] [2024-11-17 03:33:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79798958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411757948] [2024-11-17 03:33:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:17,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:17,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:17,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:17,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 136 transitions, 735 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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 03:33:17,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:17,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:17,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:17,640 INFO L124 PetriNetUnfolderBase]: 581/1816 cut-off events. [2024-11-17 03:33:17,641 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2024-11-17 03:33:17,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 1816 events. 581/1816 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13809 event pairs, 339 based on Foata normal form. 3/1363 useless extension candidates. Maximal degree in co-relation 3035. Up to 965 conditions per place. [2024-11-17 03:33:17,654 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 89 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2024-11-17 03:33:17,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 138 transitions, 929 flow [2024-11-17 03:33:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 242 transitions. [2024-11-17 03:33:17,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-11-17 03:33:17,658 INFO L175 Difference]: Start difference. First operand has 135 places, 136 transitions, 735 flow. Second operand 4 states and 242 transitions. [2024-11-17 03:33:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 138 transitions, 929 flow [2024-11-17 03:33:17,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 138 transitions, 854 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:17,662 INFO L231 Difference]: Finished difference. Result has 135 places, 137 transitions, 689 flow [2024-11-17 03:33:17,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=689, PETRI_PLACES=135, PETRI_TRANSITIONS=137} [2024-11-17 03:33:17,663 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 49 predicate places. [2024-11-17 03:33:17,663 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 137 transitions, 689 flow [2024-11-17 03:33:17,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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 03:33:17,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:17,664 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:17,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:33:17,664 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:17,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1544307045, now seen corresponding path program 1 times [2024-11-17 03:33:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710462491] [2024-11-17 03:33:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:17,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:17,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710462491] [2024-11-17 03:33:17,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710462491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:17,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509490721] [2024-11-17 03:33:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:17,766 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:17,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:33:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:17,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:17,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:17,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509490721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:17,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:17,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:33:17,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575719854] [2024-11-17 03:33:17,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:17,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:18,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:18,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 137 transitions, 689 flow. Second operand has 14 states, 14 states have (on average 52.214285714285715) internal successors, (731), 14 states have internal predecessors, (731), 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 03:33:18,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:18,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:18,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:18,560 INFO L124 PetriNetUnfolderBase]: 1128/3478 cut-off events. [2024-11-17 03:33:18,560 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2024-11-17 03:33:18,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5776 conditions, 3478 events. 1128/3478 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 30879 event pairs, 675 based on Foata normal form. 3/2632 useless extension candidates. Maximal degree in co-relation 5682. Up to 913 conditions per place. [2024-11-17 03:33:18,581 INFO L140 encePairwiseOnDemand]: 80/94 looper letters, 103 selfloop transitions, 56 changer transitions 0/200 dead transitions. [2024-11-17 03:33:18,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 200 transitions, 1317 flow [2024-11-17 03:33:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:33:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:33:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 625 transitions. [2024-11-17 03:33:18,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6044487427466151 [2024-11-17 03:33:18,583 INFO L175 Difference]: Start difference. First operand has 135 places, 137 transitions, 689 flow. Second operand 11 states and 625 transitions. [2024-11-17 03:33:18,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 200 transitions, 1317 flow [2024-11-17 03:33:18,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 1305 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:18,589 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 1000 flow [2024-11-17 03:33:18,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1000, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2024-11-17 03:33:18,590 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2024-11-17 03:33:18,590 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 1000 flow [2024-11-17 03:33:18,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.214285714285715) internal successors, (731), 14 states have internal predecessors, (731), 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 03:33:18,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:18,591 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:18,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:33:18,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:18,792 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:18,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1065455330, now seen corresponding path program 2 times [2024-11-17 03:33:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:18,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185025980] [2024-11-17 03:33:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:18,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:19,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:19,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185025980] [2024-11-17 03:33:19,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185025980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404569108] [2024-11-17 03:33:19,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:19,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:19,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:19,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:19,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:33:19,154 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:19,154 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:19,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:33:19,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:19,271 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 03:33:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:19,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404569108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:19,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-17 03:33:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696034823] [2024-11-17 03:33:19,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:19,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:33:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:33:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:33:20,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-17 03:33:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 1000 flow. Second operand has 22 states, 22 states have (on average 49.95454545454545) internal successors, (1099), 22 states have internal predecessors, (1099), 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 03:33:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-17 03:33:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:22,010 INFO L124 PetriNetUnfolderBase]: 2273/7021 cut-off events. [2024-11-17 03:33:22,011 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2024-11-17 03:33:22,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 7021 events. 2273/7021 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 67394 event pairs, 1350 based on Foata normal form. 0/5311 useless extension candidates. Maximal degree in co-relation 11799. Up to 1877 conditions per place. [2024-11-17 03:33:22,065 INFO L140 encePairwiseOnDemand]: 81/94 looper letters, 238 selfloop transitions, 69 changer transitions 0/346 dead transitions. [2024-11-17 03:33:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 346 transitions, 2906 flow [2024-11-17 03:33:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:33:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:33:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1058 transitions. [2024-11-17 03:33:22,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5923852183650616 [2024-11-17 03:33:22,069 INFO L175 Difference]: Start difference. First operand has 147 places, 157 transitions, 1000 flow. Second operand 19 states and 1058 transitions. [2024-11-17 03:33:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 346 transitions, 2906 flow [2024-11-17 03:33:22,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 346 transitions, 2879 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:22,080 INFO L231 Difference]: Finished difference. Result has 168 places, 209 transitions, 1675 flow [2024-11-17 03:33:22,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1675, PETRI_PLACES=168, PETRI_TRANSITIONS=209} [2024-11-17 03:33:22,081 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 82 predicate places. [2024-11-17 03:33:22,081 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 209 transitions, 1675 flow [2024-11-17 03:33:22,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 49.95454545454545) internal successors, (1099), 22 states have internal predecessors, (1099), 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 03:33:22,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:22,081 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:22,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:33:22,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:22,286 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:22,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1238790770, now seen corresponding path program 1 times [2024-11-17 03:33:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610412401] [2024-11-17 03:33:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:22,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610412401] [2024-11-17 03:33:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610412401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:22,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:22,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:33:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858284463] [2024-11-17 03:33:22,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:22,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:22,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:22,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 94 [2024-11-17 03:33:22,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 209 transitions, 1675 flow. Second operand has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 03:33:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:22,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 94 [2024-11-17 03:33:22,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:23,373 INFO L124 PetriNetUnfolderBase]: 2579/7255 cut-off events. [2024-11-17 03:33:23,373 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2024-11-17 03:33:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12807 conditions, 7255 events. 2579/7255 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 67391 event pairs, 1572 based on Foata normal form. 0/5911 useless extension candidates. Maximal degree in co-relation 12631. Up to 4154 conditions per place. [2024-11-17 03:33:23,429 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 122 selfloop transitions, 16 changer transitions 0/205 dead transitions. [2024-11-17 03:33:23,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 1943 flow [2024-11-17 03:33:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:33:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:33:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-11-17 03:33:23,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5829787234042553 [2024-11-17 03:33:23,434 INFO L175 Difference]: Start difference. First operand has 168 places, 209 transitions, 1675 flow. Second operand 5 states and 274 transitions. [2024-11-17 03:33:23,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 1943 flow [2024-11-17 03:33:23,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 205 transitions, 1891 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:23,451 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 1647 flow [2024-11-17 03:33:23,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1647, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-11-17 03:33:23,457 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 77 predicate places. [2024-11-17 03:33:23,457 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 1647 flow [2024-11-17 03:33:23,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 03:33:23,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:23,457 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:23,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:33:23,457 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:23,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1238790769, now seen corresponding path program 1 times [2024-11-17 03:33:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:23,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467519184] [2024-11-17 03:33:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:23,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467519184] [2024-11-17 03:33:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467519184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85134413] [2024-11-17 03:33:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:23,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:23,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:23,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:33:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:24,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-17 03:33:24,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:24,117 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 03:33:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:24,287 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 19 treesize of output 14 [2024-11-17 03:33:24,303 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-17 03:33:24,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-17 03:33:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:24,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-17 03:33:24,502 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-17 03:33:24,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2024-11-17 03:33:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:24,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-17 03:33:24,601 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-17 03:33:24,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-17 03:33:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:24,654 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85134413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:24,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:24,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2024-11-17 03:33:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406573220] [2024-11-17 03:33:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:24,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:33:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:33:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:24,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 94 [2024-11-17 03:33:24,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 1647 flow. Second operand has 7 states, 7 states have (on average 44.42857142857143) internal successors, (311), 7 states have internal predecessors, (311), 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 03:33:24,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:24,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 94 [2024-11-17 03:33:24,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:25,679 INFO L124 PetriNetUnfolderBase]: 2315/6499 cut-off events. [2024-11-17 03:33:25,680 INFO L125 PetriNetUnfolderBase]: For 1315/1315 co-relation queries the response was YES. [2024-11-17 03:33:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11591 conditions, 6499 events. 2315/6499 cut-off events. For 1315/1315 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 58494 event pairs, 1356 based on Foata normal form. 240/5419 useless extension candidates. Maximal degree in co-relation 11416. Up to 3782 conditions per place. [2024-11-17 03:33:25,714 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 142 selfloop transitions, 4 changer transitions 0/201 dead transitions. [2024-11-17 03:33:25,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 1931 flow [2024-11-17 03:33:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-11-17 03:33:25,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-11-17 03:33:25,716 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 1647 flow. Second operand 4 states and 208 transitions. [2024-11-17 03:33:25,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 1931 flow [2024-11-17 03:33:25,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 201 transitions, 1911 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:25,725 INFO L231 Difference]: Finished difference. Result has 159 places, 201 transitions, 1627 flow [2024-11-17 03:33:25,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1627, PETRI_PLACES=159, PETRI_TRANSITIONS=201} [2024-11-17 03:33:25,726 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2024-11-17 03:33:25,726 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 201 transitions, 1627 flow [2024-11-17 03:33:25,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.42857142857143) internal successors, (311), 7 states have internal predecessors, (311), 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 03:33:25,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:25,726 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:25,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:25,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:33:25,928 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:25,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 252192715, now seen corresponding path program 1 times [2024-11-17 03:33:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:25,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035537984] [2024-11-17 03:33:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:25,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035537984] [2024-11-17 03:33:26,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035537984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:26,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:26,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:33:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861526730] [2024-11-17 03:33:26,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:26,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:26,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:26,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 94 [2024-11-17 03:33:26,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 201 transitions, 1627 flow. Second operand has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 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 03:33:26,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:26,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 94 [2024-11-17 03:33:26,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:27,028 INFO L124 PetriNetUnfolderBase]: 2627/6547 cut-off events. [2024-11-17 03:33:27,028 INFO L125 PetriNetUnfolderBase]: For 1303/1303 co-relation queries the response was YES. [2024-11-17 03:33:27,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12110 conditions, 6547 events. 2627/6547 cut-off events. For 1303/1303 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 55134 event pairs, 1596 based on Foata normal form. 0/5767 useless extension candidates. Maximal degree in co-relation 11935. Up to 4214 conditions per place. [2024-11-17 03:33:27,056 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 125 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2024-11-17 03:33:27,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 1895 flow [2024-11-17 03:33:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2024-11-17 03:33:27,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-11-17 03:33:27,058 INFO L175 Difference]: Start difference. First operand has 159 places, 201 transitions, 1627 flow. Second operand 4 states and 227 transitions. [2024-11-17 03:33:27,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 1895 flow [2024-11-17 03:33:27,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 1890 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:27,111 INFO L231 Difference]: Finished difference. Result has 156 places, 197 transitions, 1640 flow [2024-11-17 03:33:27,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1640, PETRI_PLACES=156, PETRI_TRANSITIONS=197} [2024-11-17 03:33:27,112 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 70 predicate places. [2024-11-17 03:33:27,112 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 1640 flow [2024-11-17 03:33:27,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 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 03:33:27,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:27,113 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:27,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:33:27,113 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:27,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 252192716, now seen corresponding path program 1 times [2024-11-17 03:33:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972616928] [2024-11-17 03:33:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972616928] [2024-11-17 03:33:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972616928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288300137] [2024-11-17 03:33:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:27,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:27,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:33:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:27,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:33:27,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:27,610 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 03:33:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:27,777 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 19 treesize of output 14 [2024-11-17 03:33:27,800 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:33:27,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-17 03:33:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:27,923 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 19 treesize of output 14 [2024-11-17 03:33:27,937 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:33:27,939 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 03:33:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:28,046 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:28,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288300137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:28,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:28,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-17 03:33:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818614444] [2024-11-17 03:33:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:28,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:33:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:33:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:28,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 94 [2024-11-17 03:33:28,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 197 transitions, 1640 flow. Second operand has 8 states, 8 states have (on average 43.25) internal successors, (346), 8 states have internal predecessors, (346), 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 03:33:28,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:28,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 94 [2024-11-17 03:33:28,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:29,246 INFO L124 PetriNetUnfolderBase]: 2627/6175 cut-off events. [2024-11-17 03:33:29,246 INFO L125 PetriNetUnfolderBase]: For 1301/1301 co-relation queries the response was YES. [2024-11-17 03:33:29,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11771 conditions, 6175 events. 2627/6175 cut-off events. For 1301/1301 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 49389 event pairs, 1596 based on Foata normal form. 0/5395 useless extension candidates. Maximal degree in co-relation 11596. Up to 4214 conditions per place. [2024-11-17 03:33:29,270 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 125 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-11-17 03:33:29,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 1926 flow [2024-11-17 03:33:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:33:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:33:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 287 transitions. [2024-11-17 03:33:29,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5088652482269503 [2024-11-17 03:33:29,271 INFO L175 Difference]: Start difference. First operand has 156 places, 197 transitions, 1640 flow. Second operand 6 states and 287 transitions. [2024-11-17 03:33:29,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 1926 flow [2024-11-17 03:33:29,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 193 transitions, 1912 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:29,287 INFO L231 Difference]: Finished difference. Result has 155 places, 193 transitions, 1662 flow [2024-11-17 03:33:29,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1662, PETRI_PLACES=155, PETRI_TRANSITIONS=193} [2024-11-17 03:33:29,288 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 69 predicate places. [2024-11-17 03:33:29,288 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 193 transitions, 1662 flow [2024-11-17 03:33:29,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 43.25) internal successors, (346), 8 states have internal predecessors, (346), 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 03:33:29,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:29,288 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:29,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:33:29,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:33:29,493 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:29,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -771959502, now seen corresponding path program 1 times [2024-11-17 03:33:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375146848] [2024-11-17 03:33:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:29,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375146848] [2024-11-17 03:33:29,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375146848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412147605] [2024-11-17 03:33:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:29,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:29,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:29,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:33:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:29,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:33:29,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:29,969 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 03:33:30,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:30,050 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 16 treesize of output 11 [2024-11-17 03:33:30,054 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:33:30,054 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 03:33:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:30,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:30,262 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 53 treesize of output 49 [2024-11-17 03:33:30,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:33:30,390 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 32 treesize of output 37 [2024-11-17 03:33:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:30,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412147605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:30,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:30,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-17 03:33:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746068728] [2024-11-17 03:33:30,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:30,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:33:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:33:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:33:31,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-17 03:33:31,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 193 transitions, 1662 flow. Second operand has 18 states, 18 states have (on average 50.72222222222222) internal successors, (913), 18 states have internal predecessors, (913), 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 03:33:31,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:31,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-17 03:33:31,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:32,379 INFO L124 PetriNetUnfolderBase]: 2803/6939 cut-off events. [2024-11-17 03:33:32,379 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-11-17 03:33:32,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12964 conditions, 6939 events. 2803/6939 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 58555 event pairs, 1044 based on Foata normal form. 0/6103 useless extension candidates. Maximal degree in co-relation 12789. Up to 2096 conditions per place. [2024-11-17 03:33:32,510 INFO L140 encePairwiseOnDemand]: 78/94 looper letters, 161 selfloop transitions, 41 changer transitions 0/247 dead transitions. [2024-11-17 03:33:32,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 2266 flow [2024-11-17 03:33:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 718 transitions. [2024-11-17 03:33:32,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875613747954174 [2024-11-17 03:33:32,515 INFO L175 Difference]: Start difference. First operand has 155 places, 193 transitions, 1662 flow. Second operand 13 states and 718 transitions. [2024-11-17 03:33:32,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 2266 flow [2024-11-17 03:33:32,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 247 transitions, 2222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:32,525 INFO L231 Difference]: Finished difference. Result has 167 places, 199 transitions, 1801 flow [2024-11-17 03:33:32,525 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1801, PETRI_PLACES=167, PETRI_TRANSITIONS=199} [2024-11-17 03:33:32,526 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 81 predicate places. [2024-11-17 03:33:32,526 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 199 transitions, 1801 flow [2024-11-17 03:33:32,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 50.72222222222222) internal successors, (913), 18 states have internal predecessors, (913), 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 03:33:32,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:32,526 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:32,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:32,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:33:32,731 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:32,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -771959503, now seen corresponding path program 1 times [2024-11-17 03:33:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749537860] [2024-11-17 03:33:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749537860] [2024-11-17 03:33:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749537860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:32,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:32,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354249865] [2024-11-17 03:33:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:32,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:32,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:32,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:32,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 199 transitions, 1801 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 03:33:32,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:32,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:32,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:33,624 INFO L124 PetriNetUnfolderBase]: 2523/6291 cut-off events. [2024-11-17 03:33:33,624 INFO L125 PetriNetUnfolderBase]: For 2313/2393 co-relation queries the response was YES. [2024-11-17 03:33:33,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12728 conditions, 6291 events. 2523/6291 cut-off events. For 2313/2393 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 52406 event pairs, 1508 based on Foata normal form. 380/5979 useless extension candidates. Maximal degree in co-relation 12550. Up to 3932 conditions per place. [2024-11-17 03:33:33,656 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 91 selfloop transitions, 52 changer transitions 0/197 dead transitions. [2024-11-17 03:33:33,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 197 transitions, 2083 flow [2024-11-17 03:33:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:33:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:33:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 286 transitions. [2024-11-17 03:33:33,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-11-17 03:33:33,657 INFO L175 Difference]: Start difference. First operand has 167 places, 199 transitions, 1801 flow. Second operand 5 states and 286 transitions. [2024-11-17 03:33:33,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 197 transitions, 2083 flow [2024-11-17 03:33:33,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 197 transitions, 2041 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:33:33,665 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 1859 flow [2024-11-17 03:33:33,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1859, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-11-17 03:33:33,666 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 76 predicate places. [2024-11-17 03:33:33,666 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 1859 flow [2024-11-17 03:33:33,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 03:33:33,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:33,668 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:33,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-17 03:33:33,669 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:33,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1569125452, now seen corresponding path program 3 times [2024-11-17 03:33:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409631469] [2024-11-17 03:33:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:33,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409631469] [2024-11-17 03:33:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409631469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718698238] [2024-11-17 03:33:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:33:33,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:33,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:33,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:33:33,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:33:33,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:33,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:33:33,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:34,012 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 7 [2024-11-17 03:33:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-17 03:33:34,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-17 03:33:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718698238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:34,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 18 [2024-11-17 03:33:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991012132] [2024-11-17 03:33:34,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:34,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:33:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:33:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:33:34,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-17 03:33:34,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 1859 flow. Second operand has 19 states, 19 states have (on average 50.578947368421055) internal successors, (961), 19 states have internal predecessors, (961), 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 03:33:34,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:34,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-17 03:33:34,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:35,770 INFO L124 PetriNetUnfolderBase]: 2543/6211 cut-off events. [2024-11-17 03:33:35,770 INFO L125 PetriNetUnfolderBase]: For 2340/2428 co-relation queries the response was YES. [2024-11-17 03:33:35,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12637 conditions, 6211 events. 2543/6211 cut-off events. For 2340/2428 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 50957 event pairs, 1544 based on Foata normal form. 8/5567 useless extension candidates. Maximal degree in co-relation 12605. Up to 2656 conditions per place. [2024-11-17 03:33:35,824 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 127 selfloop transitions, 92 changer transitions 0/240 dead transitions. [2024-11-17 03:33:35,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 240 transitions, 2555 flow [2024-11-17 03:33:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:33:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:33:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1098 transitions. [2024-11-17 03:33:35,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5562310030395137 [2024-11-17 03:33:35,830 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 1859 flow. Second operand 21 states and 1098 transitions. [2024-11-17 03:33:35,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 240 transitions, 2555 flow [2024-11-17 03:33:35,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 240 transitions, 2450 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-17 03:33:35,853 INFO L231 Difference]: Finished difference. Result has 170 places, 187 transitions, 1858 flow [2024-11-17 03:33:35,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1858, PETRI_PLACES=170, PETRI_TRANSITIONS=187} [2024-11-17 03:33:35,857 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2024-11-17 03:33:35,857 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 187 transitions, 1858 flow [2024-11-17 03:33:35,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 50.578947368421055) internal successors, (961), 19 states have internal predecessors, (961), 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 03:33:35,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:35,861 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:35,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:33:36,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,062 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:36,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1172240992, now seen corresponding path program 3 times [2024-11-17 03:33:36,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:36,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721778467] [2024-11-17 03:33:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:36,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:36,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721778467] [2024-11-17 03:33:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721778467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154845195] [2024-11-17 03:33:36,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:33:36,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:36,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:36,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:33:36,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:33:36,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:36,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:33:36,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:36,349 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 03:33:36,428 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 17 treesize of output 13 [2024-11-17 03:33:36,496 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 7 [2024-11-17 03:33:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:36,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154845195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:36,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2024-11-17 03:33:36,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687457369] [2024-11-17 03:33:36,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:36,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:33:36,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:33:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:33:38,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-11-17 03:33:38,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 187 transitions, 1858 flow. Second operand has 21 states, 21 states have (on average 50.42857142857143) internal successors, (1059), 21 states have internal predecessors, (1059), 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 03:33:38,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:38,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-11-17 03:33:38,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:39,352 INFO L124 PetriNetUnfolderBase]: 2488/6161 cut-off events. [2024-11-17 03:33:39,352 INFO L125 PetriNetUnfolderBase]: For 2206/2294 co-relation queries the response was YES. [2024-11-17 03:33:39,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 6161 events. 2488/6161 cut-off events. For 2206/2294 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 51007 event pairs, 1506 based on Foata normal form. 9/5504 useless extension candidates. Maximal degree in co-relation 12386. Up to 2001 conditions per place. [2024-11-17 03:33:39,408 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 107 selfloop transitions, 105 changer transitions 0/233 dead transitions. [2024-11-17 03:33:39,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 233 transitions, 2508 flow [2024-11-17 03:33:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:33:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:33:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1236 transitions. [2024-11-17 03:33:39,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-11-17 03:33:39,413 INFO L175 Difference]: Start difference. First operand has 170 places, 187 transitions, 1858 flow. Second operand 24 states and 1236 transitions. [2024-11-17 03:33:39,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 233 transitions, 2508 flow [2024-11-17 03:33:39,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 233 transitions, 2336 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-11-17 03:33:39,424 INFO L231 Difference]: Finished difference. Result has 177 places, 192 transitions, 1960 flow [2024-11-17 03:33:39,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1960, PETRI_PLACES=177, PETRI_TRANSITIONS=192} [2024-11-17 03:33:39,425 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2024-11-17 03:33:39,425 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 192 transitions, 1960 flow [2024-11-17 03:33:39,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.42857142857143) internal successors, (1059), 21 states have internal predecessors, (1059), 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 03:33:39,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:39,426 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:39,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:33:39,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 03:33:39,627 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:39,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:39,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1214152265, now seen corresponding path program 1 times [2024-11-17 03:33:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827875496] [2024-11-17 03:33:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:39,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:39,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827875496] [2024-11-17 03:33:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827875496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:39,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:39,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994749429] [2024-11-17 03:33:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:39,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:39,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:39,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 192 transitions, 1960 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 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 03:33:39,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:39,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:39,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:40,510 INFO L124 PetriNetUnfolderBase]: 2502/5939 cut-off events. [2024-11-17 03:33:40,511 INFO L125 PetriNetUnfolderBase]: For 2146/2226 co-relation queries the response was YES. [2024-11-17 03:33:40,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 5939 events. 2502/5939 cut-off events. For 2146/2226 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 47376 event pairs, 1508 based on Foata normal form. 0/5503 useless extension candidates. Maximal degree in co-relation 12183. Up to 3926 conditions per place. [2024-11-17 03:33:40,547 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 102 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-11-17 03:33:40,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 190 transitions, 2220 flow [2024-11-17 03:33:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2024-11-17 03:33:40,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-11-17 03:33:40,548 INFO L175 Difference]: Start difference. First operand has 177 places, 192 transitions, 1960 flow. Second operand 4 states and 236 transitions. [2024-11-17 03:33:40,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 190 transitions, 2220 flow [2024-11-17 03:33:40,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 190 transitions, 2019 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-11-17 03:33:40,556 INFO L231 Difference]: Finished difference. Result has 164 places, 190 transitions, 1815 flow [2024-11-17 03:33:40,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1815, PETRI_PLACES=164, PETRI_TRANSITIONS=190} [2024-11-17 03:33:40,557 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2024-11-17 03:33:40,557 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 190 transitions, 1815 flow [2024-11-17 03:33:40,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 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 03:33:40,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:40,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:40,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-17 03:33:40,558 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:40,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1214152264, now seen corresponding path program 1 times [2024-11-17 03:33:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346905851] [2024-11-17 03:33:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:40,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:40,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346905851] [2024-11-17 03:33:40,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346905851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:40,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617703661] [2024-11-17 03:33:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:40,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:40,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:40,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:33:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:40,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:33:40,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:40,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:41,021 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 23 treesize of output 19 [2024-11-17 03:33:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617703661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:41,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-17 03:33:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93802438] [2024-11-17 03:33:41,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:41,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:33:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:33:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:33:41,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 190 transitions, 1815 flow. Second operand has 19 states, 19 states have (on average 52.578947368421055) internal successors, (999), 19 states have internal predecessors, (999), 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 03:33:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:42,429 INFO L124 PetriNetUnfolderBase]: 3150/7183 cut-off events. [2024-11-17 03:33:42,430 INFO L125 PetriNetUnfolderBase]: For 2091/2189 co-relation queries the response was YES. [2024-11-17 03:33:42,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14583 conditions, 7183 events. 3150/7183 cut-off events. For 2091/2189 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 58039 event pairs, 1091 based on Foata normal form. 0/6552 useless extension candidates. Maximal degree in co-relation 14564. Up to 2661 conditions per place. [2024-11-17 03:33:42,481 INFO L140 encePairwiseOnDemand]: 78/94 looper letters, 154 selfloop transitions, 44 changer transitions 0/245 dead transitions. [2024-11-17 03:33:42,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 245 transitions, 2396 flow [2024-11-17 03:33:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:33:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:33:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 692 transitions. [2024-11-17 03:33:42,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-11-17 03:33:42,483 INFO L175 Difference]: Start difference. First operand has 164 places, 190 transitions, 1815 flow. Second operand 12 states and 692 transitions. [2024-11-17 03:33:42,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 245 transitions, 2396 flow [2024-11-17 03:33:42,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 245 transitions, 2354 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:42,492 INFO L231 Difference]: Finished difference. Result has 177 places, 195 transitions, 1936 flow [2024-11-17 03:33:42,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1936, PETRI_PLACES=177, PETRI_TRANSITIONS=195} [2024-11-17 03:33:42,493 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2024-11-17 03:33:42,493 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 195 transitions, 1936 flow [2024-11-17 03:33:42,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.578947368421055) internal successors, (999), 19 states have internal predecessors, (999), 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 03:33:42,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:42,494 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:42,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:42,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-17 03:33:42,699 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:42,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash -126239623, now seen corresponding path program 1 times [2024-11-17 03:33:42,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:42,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589900294] [2024-11-17 03:33:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589900294] [2024-11-17 03:33:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589900294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496794052] [2024-11-17 03:33:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:42,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:42,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:42,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:33:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:42,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:43,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:43,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496794052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:43,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:33:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761035985] [2024-11-17 03:33:43,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:43,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:43,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:43,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 195 transitions, 1936 flow. Second operand has 14 states, 14 states have (on average 52.714285714285715) internal successors, (738), 14 states have internal predecessors, (738), 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 03:33:43,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:43,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:43,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:44,069 INFO L124 PetriNetUnfolderBase]: 2910/6796 cut-off events. [2024-11-17 03:33:44,069 INFO L125 PetriNetUnfolderBase]: For 3226/3399 co-relation queries the response was YES. [2024-11-17 03:33:44,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14769 conditions, 6796 events. 2910/6796 cut-off events. For 3226/3399 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 54502 event pairs, 1817 based on Foata normal form. 9/6366 useless extension candidates. Maximal degree in co-relation 14746. Up to 3759 conditions per place. [2024-11-17 03:33:44,114 INFO L140 encePairwiseOnDemand]: 83/94 looper letters, 125 selfloop transitions, 81 changer transitions 0/225 dead transitions. [2024-11-17 03:33:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 225 transitions, 2354 flow [2024-11-17 03:33:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:33:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:33:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 627 transitions. [2024-11-17 03:33:44,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-11-17 03:33:44,118 INFO L175 Difference]: Start difference. First operand has 177 places, 195 transitions, 1936 flow. Second operand 11 states and 627 transitions. [2024-11-17 03:33:44,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 225 transitions, 2354 flow [2024-11-17 03:33:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 225 transitions, 2299 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:33:44,128 INFO L231 Difference]: Finished difference. Result has 182 places, 202 transitions, 2070 flow [2024-11-17 03:33:44,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2070, PETRI_PLACES=182, PETRI_TRANSITIONS=202} [2024-11-17 03:33:44,130 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 96 predicate places. [2024-11-17 03:33:44,130 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 202 transitions, 2070 flow [2024-11-17 03:33:44,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.714285714285715) internal successors, (738), 14 states have internal predecessors, (738), 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 03:33:44,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:44,131 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:44,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:33:44,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:44,332 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:44,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1913825042, now seen corresponding path program 2 times [2024-11-17 03:33:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217468830] [2024-11-17 03:33:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:44,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217468830] [2024-11-17 03:33:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217468830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:44,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890443914] [2024-11-17 03:33:44,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:44,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:44,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:44,614 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:44,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:33:44,731 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:33:44,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:44,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:33:44,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:44,781 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 03:33:44,786 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 03:33:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:44,844 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 16 treesize of output 11 [2024-11-17 03:33:44,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:33:44,851 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 03:33:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-17 03:33:44,921 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:44,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890443914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:44,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:44,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-17 03:33:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427047466] [2024-11-17 03:33:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:44,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:44,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:33:45,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-11-17 03:33:45,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 202 transitions, 2070 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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 03:33:45,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:45,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-11-17 03:33:45,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:45,642 INFO L124 PetriNetUnfolderBase]: 2771/6390 cut-off events. [2024-11-17 03:33:45,643 INFO L125 PetriNetUnfolderBase]: For 3462/3525 co-relation queries the response was YES. [2024-11-17 03:33:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13929 conditions, 6390 events. 2771/6390 cut-off events. For 3462/3525 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 49942 event pairs, 1747 based on Foata normal form. 160/6123 useless extension candidates. Maximal degree in co-relation 13904. Up to 4492 conditions per place. [2024-11-17 03:33:45,682 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 118 selfloop transitions, 29 changer transitions 0/200 dead transitions. [2024-11-17 03:33:45,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 200 transitions, 2352 flow [2024-11-17 03:33:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:33:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:33:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 286 transitions. [2024-11-17 03:33:45,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-11-17 03:33:45,684 INFO L175 Difference]: Start difference. First operand has 182 places, 202 transitions, 2070 flow. Second operand 5 states and 286 transitions. [2024-11-17 03:33:45,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 200 transitions, 2352 flow [2024-11-17 03:33:45,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 200 transitions, 2287 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-17 03:33:45,694 INFO L231 Difference]: Finished difference. Result has 176 places, 200 transitions, 2051 flow [2024-11-17 03:33:45,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2051, PETRI_PLACES=176, PETRI_TRANSITIONS=200} [2024-11-17 03:33:45,695 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 90 predicate places. [2024-11-17 03:33:45,695 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 200 transitions, 2051 flow [2024-11-17 03:33:45,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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 03:33:45,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:45,695 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:45,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:45,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:45,896 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:45,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash 798410845, now seen corresponding path program 2 times [2024-11-17 03:33:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118631773] [2024-11-17 03:33:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118631773] [2024-11-17 03:33:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118631773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:46,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182489629] [2024-11-17 03:33:46,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:46,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:46,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:33:46,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:33:46,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:46,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:33:46,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:46,536 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 03:33:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 03:33:46,661 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:46,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182489629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:46,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2024-11-17 03:33:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245665387] [2024-11-17 03:33:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:46,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:46,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:46,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2024-11-17 03:33:46,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 200 transitions, 2051 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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 03:33:46,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:46,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2024-11-17 03:33:46,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:47,511 INFO L124 PetriNetUnfolderBase]: 2645/5889 cut-off events. [2024-11-17 03:33:47,511 INFO L125 PetriNetUnfolderBase]: For 2907/2907 co-relation queries the response was YES. [2024-11-17 03:33:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12768 conditions, 5889 events. 2645/5889 cut-off events. For 2907/2907 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 43892 event pairs, 1675 based on Foata normal form. 183/5687 useless extension candidates. Maximal degree in co-relation 12745. Up to 4197 conditions per place. [2024-11-17 03:33:47,545 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 118 selfloop transitions, 29 changer transitions 0/198 dead transitions. [2024-11-17 03:33:47,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 198 transitions, 2333 flow [2024-11-17 03:33:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:33:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:33:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-11-17 03:33:47,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-11-17 03:33:47,547 INFO L175 Difference]: Start difference. First operand has 176 places, 200 transitions, 2051 flow. Second operand 5 states and 296 transitions. [2024-11-17 03:33:47,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 198 transitions, 2333 flow [2024-11-17 03:33:47,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 198 transitions, 2286 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:47,558 INFO L231 Difference]: Finished difference. Result has 173 places, 198 transitions, 2050 flow [2024-11-17 03:33:47,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2050, PETRI_PLACES=173, PETRI_TRANSITIONS=198} [2024-11-17 03:33:47,559 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 87 predicate places. [2024-11-17 03:33:47,559 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 198 transitions, 2050 flow [2024-11-17 03:33:47,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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 03:33:47,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:47,559 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:47,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:47,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-17 03:33:47,760 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:47,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 916653136, now seen corresponding path program 1 times [2024-11-17 03:33:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:47,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520995653] [2024-11-17 03:33:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:47,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:47,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520995653] [2024-11-17 03:33:47,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520995653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:47,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:47,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708431244] [2024-11-17 03:33:47,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:47,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:47,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:47,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2024-11-17 03:33:47,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 198 transitions, 2050 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 03:33:47,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:47,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2024-11-17 03:33:47,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:48,759 INFO L124 PetriNetUnfolderBase]: 4013/7894 cut-off events. [2024-11-17 03:33:48,760 INFO L125 PetriNetUnfolderBase]: For 2206/2206 co-relation queries the response was YES. [2024-11-17 03:33:48,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17392 conditions, 7894 events. 4013/7894 cut-off events. For 2206/2206 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 56127 event pairs, 1948 based on Foata normal form. 0/7272 useless extension candidates. Maximal degree in co-relation 17371. Up to 4696 conditions per place. [2024-11-17 03:33:48,807 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 160 selfloop transitions, 3 changer transitions 0/211 dead transitions. [2024-11-17 03:33:48,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 211 transitions, 2410 flow [2024-11-17 03:33:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2024-11-17 03:33:48,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7198581560283688 [2024-11-17 03:33:48,808 INFO L175 Difference]: Start difference. First operand has 173 places, 198 transitions, 2050 flow. Second operand 3 states and 203 transitions. [2024-11-17 03:33:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 211 transitions, 2410 flow [2024-11-17 03:33:48,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 211 transitions, 2364 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:48,818 INFO L231 Difference]: Finished difference. Result has 174 places, 200 transitions, 2026 flow [2024-11-17 03:33:48,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2026, PETRI_PLACES=174, PETRI_TRANSITIONS=200} [2024-11-17 03:33:48,819 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2024-11-17 03:33:48,819 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 200 transitions, 2026 flow [2024-11-17 03:33:48,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 03:33:48,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:48,820 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:48,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-17 03:33:48,820 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:48,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash 637239188, now seen corresponding path program 1 times [2024-11-17 03:33:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855181347] [2024-11-17 03:33:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:48,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:48,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855181347] [2024-11-17 03:33:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855181347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:48,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:48,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112441668] [2024-11-17 03:33:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:48,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:48,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2024-11-17 03:33:48,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 200 transitions, 2026 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 03:33:48,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:48,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2024-11-17 03:33:48,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:49,787 INFO L124 PetriNetUnfolderBase]: 4287/8274 cut-off events. [2024-11-17 03:33:49,787 INFO L125 PetriNetUnfolderBase]: For 3464/3632 co-relation queries the response was YES. [2024-11-17 03:33:49,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 8274 events. 4287/8274 cut-off events. For 3464/3632 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 58841 event pairs, 2278 based on Foata normal form. 168/7870 useless extension candidates. Maximal degree in co-relation 20139. Up to 5232 conditions per place. [2024-11-17 03:33:49,833 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 161 selfloop transitions, 3 changer transitions 0/213 dead transitions. [2024-11-17 03:33:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 213 transitions, 2396 flow [2024-11-17 03:33:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2024-11-17 03:33:49,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7163120567375887 [2024-11-17 03:33:49,834 INFO L175 Difference]: Start difference. First operand has 174 places, 200 transitions, 2026 flow. Second operand 3 states and 202 transitions. [2024-11-17 03:33:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 213 transitions, 2396 flow [2024-11-17 03:33:49,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 2388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:49,865 INFO L231 Difference]: Finished difference. Result has 176 places, 202 transitions, 2042 flow [2024-11-17 03:33:49,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2042, PETRI_PLACES=176, PETRI_TRANSITIONS=202} [2024-11-17 03:33:49,865 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 90 predicate places. [2024-11-17 03:33:49,865 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 202 transitions, 2042 flow [2024-11-17 03:33:49,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 03:33:49,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:49,866 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:49,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-17 03:33:49,866 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:49,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1037555086, now seen corresponding path program 1 times [2024-11-17 03:33:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394907543] [2024-11-17 03:33:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:50,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394907543] [2024-11-17 03:33:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394907543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:50,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:33:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047685307] [2024-11-17 03:33:50,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:50,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:33:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:33:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:33:50,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:33:50,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 202 transitions, 2042 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:33:50,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:50,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:33:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:52,703 INFO L124 PetriNetUnfolderBase]: 9626/19858 cut-off events. [2024-11-17 03:33:52,703 INFO L125 PetriNetUnfolderBase]: For 8026/8660 co-relation queries the response was YES. [2024-11-17 03:33:52,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49612 conditions, 19858 events. 9626/19858 cut-off events. For 8026/8660 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 180796 event pairs, 491 based on Foata normal form. 646/20218 useless extension candidates. Maximal degree in co-relation 49589. Up to 4579 conditions per place. [2024-11-17 03:33:52,971 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 236 selfloop transitions, 6 changer transitions 7/302 dead transitions. [2024-11-17 03:33:52,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 302 transitions, 2900 flow [2024-11-17 03:33:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 652 transitions. [2024-11-17 03:33:52,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6936170212765957 [2024-11-17 03:33:52,972 INFO L175 Difference]: Start difference. First operand has 176 places, 202 transitions, 2042 flow. Second operand 10 states and 652 transitions. [2024-11-17 03:33:52,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 302 transitions, 2900 flow [2024-11-17 03:33:53,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 302 transitions, 2882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:53,407 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 2089 flow [2024-11-17 03:33:53,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2089, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2024-11-17 03:33:53,407 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 105 predicate places. [2024-11-17 03:33:53,407 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 2089 flow [2024-11-17 03:33:53,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:33:53,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:53,408 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:53,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-17 03:33:53,408 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:53,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -304696060, now seen corresponding path program 2 times [2024-11-17 03:33:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469739892] [2024-11-17 03:33:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469739892] [2024-11-17 03:33:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469739892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:53,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:53,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:33:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092083900] [2024-11-17 03:33:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:53,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:33:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:33:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:33:54,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:33:54,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 2089 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:33:54,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:54,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:33:54,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:57,015 INFO L124 PetriNetUnfolderBase]: 10074/21526 cut-off events. [2024-11-17 03:33:57,015 INFO L125 PetriNetUnfolderBase]: For 14253/14979 co-relation queries the response was YES. [2024-11-17 03:33:57,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57968 conditions, 21526 events. 10074/21526 cut-off events. For 14253/14979 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 206177 event pairs, 1306 based on Foata normal form. 738/21986 useless extension candidates. Maximal degree in co-relation 57937. Up to 10545 conditions per place. [2024-11-17 03:33:57,195 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 209 selfloop transitions, 8 changer transitions 6/276 dead transitions. [2024-11-17 03:33:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 276 transitions, 2826 flow [2024-11-17 03:33:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 630 transitions. [2024-11-17 03:33:57,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-11-17 03:33:57,197 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 2089 flow. Second operand 10 states and 630 transitions. [2024-11-17 03:33:57,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 276 transitions, 2826 flow [2024-11-17 03:33:57,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 276 transitions, 2807 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:57,799 INFO L231 Difference]: Finished difference. Result has 200 places, 209 transitions, 2121 flow [2024-11-17 03:33:57,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2121, PETRI_PLACES=200, PETRI_TRANSITIONS=209} [2024-11-17 03:33:57,799 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 114 predicate places. [2024-11-17 03:33:57,800 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 209 transitions, 2121 flow [2024-11-17 03:33:57,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:33:57,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:57,800 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:57,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-17 03:33:57,800 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:33:57,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1982331112, now seen corresponding path program 3 times [2024-11-17 03:33:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275385165] [2024-11-17 03:33:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:58,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:58,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275385165] [2024-11-17 03:33:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275385165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:58,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:58,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:33:58,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649806570] [2024-11-17 03:33:58,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:58,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:33:58,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:33:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:33:59,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:33:59,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 209 transitions, 2121 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:33:59,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:33:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:03,040 INFO L124 PetriNetUnfolderBase]: 10922/24350 cut-off events. [2024-11-17 03:34:03,042 INFO L125 PetriNetUnfolderBase]: For 27583/28453 co-relation queries the response was YES. [2024-11-17 03:34:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68797 conditions, 24350 events. 10922/24350 cut-off events. For 27583/28453 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 247260 event pairs, 1903 based on Foata normal form. 882/24854 useless extension candidates. Maximal degree in co-relation 68763. Up to 11880 conditions per place. [2024-11-17 03:34:03,332 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 208 selfloop transitions, 11 changer transitions 7/279 dead transitions. [2024-11-17 03:34:03,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 279 transitions, 2876 flow [2024-11-17 03:34:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:34:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:34:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 637 transitions. [2024-11-17 03:34:03,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6776595744680851 [2024-11-17 03:34:03,334 INFO L175 Difference]: Start difference. First operand has 200 places, 209 transitions, 2121 flow. Second operand 10 states and 637 transitions. [2024-11-17 03:34:03,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 279 transitions, 2876 flow [2024-11-17 03:34:03,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 2820 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-17 03:34:03,769 INFO L231 Difference]: Finished difference. Result has 207 places, 211 transitions, 2152 flow [2024-11-17 03:34:03,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2152, PETRI_PLACES=207, PETRI_TRANSITIONS=211} [2024-11-17 03:34:03,769 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 121 predicate places. [2024-11-17 03:34:03,769 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 211 transitions, 2152 flow [2024-11-17 03:34:03,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:03,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:03,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:03,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-17 03:34:03,770 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:34:03,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash -553179170, now seen corresponding path program 4 times [2024-11-17 03:34:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953190811] [2024-11-17 03:34:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:34:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953190811] [2024-11-17 03:34:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953190811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:04,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:04,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:34:04,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699812768] [2024-11-17 03:34:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:04,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:34:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:34:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:34:04,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:34:04,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 211 transitions, 2152 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:04,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:04,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:34:04,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:08,502 INFO L124 PetriNetUnfolderBase]: 11346/25666 cut-off events. [2024-11-17 03:34:08,502 INFO L125 PetriNetUnfolderBase]: For 37105/37963 co-relation queries the response was YES. [2024-11-17 03:34:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74829 conditions, 25666 events. 11346/25666 cut-off events. For 37105/37963 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 263874 event pairs, 2076 based on Foata normal form. 870/26159 useless extension candidates. Maximal degree in co-relation 74792. Up to 14745 conditions per place. [2024-11-17 03:34:08,673 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 214 selfloop transitions, 11 changer transitions 6/284 dead transitions. [2024-11-17 03:34:08,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 284 transitions, 2992 flow [2024-11-17 03:34:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:34:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:34:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 636 transitions. [2024-11-17 03:34:08,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.676595744680851 [2024-11-17 03:34:08,676 INFO L175 Difference]: Start difference. First operand has 207 places, 211 transitions, 2152 flow. Second operand 10 states and 636 transitions. [2024-11-17 03:34:08,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 284 transitions, 2992 flow [2024-11-17 03:34:09,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 284 transitions, 2927 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-17 03:34:09,123 INFO L231 Difference]: Finished difference. Result has 214 places, 214 transitions, 2187 flow [2024-11-17 03:34:09,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2187, PETRI_PLACES=214, PETRI_TRANSITIONS=214} [2024-11-17 03:34:09,124 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 128 predicate places. [2024-11-17 03:34:09,124 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 214 transitions, 2187 flow [2024-11-17 03:34:09,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:09,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:09,125 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:09,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-17 03:34:09,125 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:34:09,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -468977304, now seen corresponding path program 5 times [2024-11-17 03:34:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342240592] [2024-11-17 03:34:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:34:09,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342240592] [2024-11-17 03:34:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342240592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:09,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:09,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:34:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320147573] [2024-11-17 03:34:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:09,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:34:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:34:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:34:10,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:34:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 214 transitions, 2187 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:10,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:10,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:34:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:14,992 INFO L124 PetriNetUnfolderBase]: 11956/27360 cut-off events. [2024-11-17 03:34:14,992 INFO L125 PetriNetUnfolderBase]: For 53280/54184 co-relation queries the response was YES. [2024-11-17 03:34:15,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82998 conditions, 27360 events. 11956/27360 cut-off events. For 53280/54184 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 286475 event pairs, 2605 based on Foata normal form. 916/27859 useless extension candidates. Maximal degree in co-relation 82958. Up to 16560 conditions per place. [2024-11-17 03:34:15,195 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 214 selfloop transitions, 14 changer transitions 7/288 dead transitions. [2024-11-17 03:34:15,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 288 transitions, 3034 flow [2024-11-17 03:34:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:34:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:34:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 639 transitions. [2024-11-17 03:34:15,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6797872340425531 [2024-11-17 03:34:15,197 INFO L175 Difference]: Start difference. First operand has 214 places, 214 transitions, 2187 flow. Second operand 10 states and 639 transitions. [2024-11-17 03:34:15,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 288 transitions, 3034 flow [2024-11-17 03:34:15,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 288 transitions, 2959 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-17 03:34:15,752 INFO L231 Difference]: Finished difference. Result has 220 places, 217 transitions, 2227 flow [2024-11-17 03:34:15,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2227, PETRI_PLACES=220, PETRI_TRANSITIONS=217} [2024-11-17 03:34:15,753 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 134 predicate places. [2024-11-17 03:34:15,753 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 217 transitions, 2227 flow [2024-11-17 03:34:15,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:15,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:15,753 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:15,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-17 03:34:15,753 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-17 03:34:15,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2090180932, now seen corresponding path program 6 times [2024-11-17 03:34:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:15,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192886340] [2024-11-17 03:34:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:34:16,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192886340] [2024-11-17 03:34:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192886340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:16,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:34:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-17 03:34:16,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007351484] [2024-11-17 03:34:16,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:16,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:34:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:34:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:34:16,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-11-17 03:34:16,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 217 transitions, 2227 flow. Second operand has 10 states, 10 states have (on average 57.2) internal successors, (572), 10 states have internal predecessors, (572), 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 03:34:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-11-17 03:34:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand