./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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-trans.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 c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:43:17,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:43:17,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:43:17,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:43:17,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:43:17,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:43:17,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:43:17,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:43:17,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:43:17,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:43:17,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:43:17,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:43:17,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:43:17,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:43:17,920 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:43:17,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:43:17,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:43:17,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:43:17,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:43:17,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:43:17,921 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:43:17,924 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:43:17,925 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:43:17,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:43:17,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:43:17,926 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:43:17,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:43:17,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-11-22 21:43:18,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:43:18,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:43:18,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:43:18,146 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:43:18,146 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:43:18,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-22 21:43:19,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:43:19,513 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:43:19,513 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-22 21:43:19,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faeffc7bf/cbcb3dac5aaa4d8d9182f8d6abfdc1f2/FLAG072a79dee [2024-11-22 21:43:19,531 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faeffc7bf/cbcb3dac5aaa4d8d9182f8d6abfdc1f2 [2024-11-22 21:43:19,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:43:19,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:43:19,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:43:19,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:43:19,540 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:43:19,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d4612b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19, skipping insertion in model container [2024-11-22 21:43:19,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,559 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:43:19,741 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:43:19,746 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:43:19,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:43:19,760 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:43:19,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:43:19,806 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:43:19,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19 WrapperNode [2024-11-22 21:43:19,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:43:19,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:43:19,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:43:19,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:43:19,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,852 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-11-22 21:43:19,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:43:19,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:43:19,857 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:43:19,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:43:19,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,876 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,899 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-22 21:43:19,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:43:19,928 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:43:19,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:43:19,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:43:19,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (1/1) ... [2024-11-22 21:43:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:43:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:19,963 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) [2024-11-22 21:43:19,966 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 [2024-11-22 21:43:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:43:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:43:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:43:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 21:43:20,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:43:20,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:43:20,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 21:43:20,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:43:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:43:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:43:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:43:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:43:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:43:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:43:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:43:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 21:43:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:43:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:43:20,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:43:20,008 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:43:20,160 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:43:20,162 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:43:20,731 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:43:20,731 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:43:21,053 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:43:21,054 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:43:21,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:43:21 BoogieIcfgContainer [2024-11-22 21:43:21,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:43:21,056 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:43:21,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:43:21,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:43:21,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:43:19" (1/3) ... [2024-11-22 21:43:21,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad12c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:43:21, skipping insertion in model container [2024-11-22 21:43:21,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:19" (2/3) ... [2024-11-22 21:43:21,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad12c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:43:21, skipping insertion in model container [2024-11-22 21:43:21,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:43:21" (3/3) ... [2024-11-22 21:43:21,061 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-11-22 21:43:21,075 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:43:21,075 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-22 21:43:21,075 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:43:21,141 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:43:21,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-11-22 21:43:21,208 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-11-22 21:43:21,208 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:43:21,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-22 21:43:21,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-11-22 21:43:21,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-11-22 21:43:21,227 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:43:21,233 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;@6de85a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:43:21,233 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-22 21:43:21,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:43:21,236 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:43:21,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:43:21,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:21,237 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:43:21,238 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:21,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-11-22 21:43:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156960818] [2024-11-22 21:43:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156960818] [2024-11-22 21:43:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156960818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:21,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:21,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:43:21,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087013583] [2024-11-22 21:43:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:21,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:43:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:43:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:43:21,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:21,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-22 21:43:21,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:21,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:21,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:22,165 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-11-22 21:43:22,166 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-22 21:43:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-11-22 21:43:22,205 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-22 21:43:22,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-11-22 21:43:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-22 21:43:22,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-22 21:43:22,221 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-11-22 21:43:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-11-22 21:43:22,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:22,236 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-11-22 21:43:22,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-11-22 21:43:22,243 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-11-22 21:43:22,243 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-11-22 21:43:22,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-22 21:43:22,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:22,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:43:22,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:43:22,244 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:22,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-11-22 21:43:22,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:22,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415506198] [2024-11-22 21:43:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:22,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:22,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:22,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415506198] [2024-11-22 21:43:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415506198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:22,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:22,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:43:22,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311617472] [2024-11-22 21:43:22,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:22,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:22,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:22,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 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) [2024-11-22 21:43:22,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:22,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:22,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:22,998 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-11-22 21:43:22,998 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-22 21:43:23,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-11-22 21:43:23,029 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-22 21:43:23,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-11-22 21:43:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-22 21:43:23,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-22 21:43:23,031 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-11-22 21:43:23,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-11-22 21:43:23,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:23,036 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-11-22 21:43:23,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-11-22 21:43:23,037 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-22 21:43:23,037 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-11-22 21:43:23,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 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) [2024-11-22 21:43:23,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:23,037 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:43:23,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:43:23,037 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:23,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-11-22 21:43:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843649864] [2024-11-22 21:43:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843649864] [2024-11-22 21:43:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843649864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946497120] [2024-11-22 21:43:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:23,278 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) [2024-11-22 21:43:23,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:43:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:23,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:43:23,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:23,415 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 [2024-11-22 21:43:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:23,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946497120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:23,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:23,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:43:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991276255] [2024-11-22 21:43:23,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:23,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:43:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:43:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:43:24,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:24,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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) [2024-11-22 21:43:24,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:24,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:24,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:24,685 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-11-22 21:43:24,685 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-22 21:43:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-11-22 21:43:24,720 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-22 21:43:24,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-11-22 21:43:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:43:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:43:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-11-22 21:43:24,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-22 21:43:24,723 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-11-22 21:43:24,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-11-22 21:43:24,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:43:24,727 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-11-22 21:43:24,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-22 21:43:24,728 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-11-22 21:43:24,728 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-11-22 21:43:24,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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) [2024-11-22 21:43:24,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:24,729 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:43:24,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:43:24,934 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 [2024-11-22 21:43:24,937 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:24,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-11-22 21:43:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:24,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266851003] [2024-11-22 21:43:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:43:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266851003] [2024-11-22 21:43:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266851003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:25,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951319388] [2024-11-22 21:43:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:25,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:43:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:43:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:43:25,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:25,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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) [2024-11-22 21:43:25,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:25,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:25,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:25,543 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-11-22 21:43:25,543 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-22 21:43:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-11-22 21:43:25,567 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-22 21:43:25,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-11-22 21:43:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-11-22 21:43:25,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-22 21:43:25,569 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-11-22 21:43:25,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-11-22 21:43:25,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:25,571 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-11-22 21:43:25,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-11-22 21:43:25,572 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-11-22 21:43:25,572 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-11-22 21:43:25,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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) [2024-11-22 21:43:25,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:25,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:25,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:43:25,573 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:25,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:25,574 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-11-22 21:43:25,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:25,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120141579] [2024-11-22 21:43:25,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:25,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:43:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120141579] [2024-11-22 21:43:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120141579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:25,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:25,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100646823] [2024-11-22 21:43:25,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:25,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:25,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:25,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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) [2024-11-22 21:43:25,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:25,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:25,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:25,961 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-11-22 21:43:25,962 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-22 21:43:25,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-11-22 21:43:25,990 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-22 21:43:25,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-11-22 21:43:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-11-22 21:43:25,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-22 21:43:25,991 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-11-22 21:43:25,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-11-22 21:43:25,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:25,993 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-11-22 21:43:25,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-11-22 21:43:25,994 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-22 21:43:25,994 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-11-22 21:43:25,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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) [2024-11-22 21:43:25,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:25,995 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:25,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:43:25,995 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:25,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:25,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-11-22 21:43:25,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:25,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148323487] [2024-11-22 21:43:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:25,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:43:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148323487] [2024-11-22 21:43:26,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148323487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310674154] [2024-11-22 21:43:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:26,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:26,178 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) [2024-11-22 21:43:26,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:43:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:26,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:43:26,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:26,265 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 [2024-11-22 21:43:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:43:26,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:43:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310674154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:26,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:43:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86449920] [2024-11-22 21:43:26,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:26,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:43:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:43:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:43:27,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:27,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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) [2024-11-22 21:43:27,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:27,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:27,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:27,726 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-22 21:43:27,727 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-22 21:43:27,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-11-22 21:43:27,751 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-11-22 21:43:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-11-22 21:43:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:43:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:43:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-22 21:43:27,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-22 21:43:27,754 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-11-22 21:43:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-11-22 21:43:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:27,756 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-11-22 21:43:27,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-22 21:43:27,758 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-22 21:43:27,758 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-11-22 21:43:27,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 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) [2024-11-22 21:43:27,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:27,759 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:27,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:43:27,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 21:43:27,961 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:27,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-11-22 21:43:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886637583] [2024-11-22 21:43:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886637583] [2024-11-22 21:43:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886637583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520011265] [2024-11-22 21:43:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:28,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:43:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:43:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:43:28,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:28,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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) [2024-11-22 21:43:28,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:28,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:28,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:28,575 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-11-22 21:43:28,575 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-22 21:43:28,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-11-22 21:43:28,599 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-22 21:43:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-11-22 21:43:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-22 21:43:28,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-22 21:43:28,601 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-11-22 21:43:28,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-11-22 21:43:28,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:28,604 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-11-22 21:43:28,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-11-22 21:43:28,605 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-22 21:43:28,605 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-11-22 21:43:28,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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) [2024-11-22 21:43:28,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:28,606 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:28,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:43:28,606 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:28,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-11-22 21:43:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:28,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295590603] [2024-11-22 21:43:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295590603] [2024-11-22 21:43:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295590603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468439894] [2024-11-22 21:43:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:28,836 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) [2024-11-22 21:43:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:43:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:28,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:43:28,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:28,961 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 [2024-11-22 21:43:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:29,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468439894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:29,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:43:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792018727] [2024-11-22 21:43:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:29,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:43:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:29,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:43:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:43:29,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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) [2024-11-22 21:43:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:30,069 INFO L124 PetriNetUnfolderBase]: 2207/4842 cut-off events. [2024-11-22 21:43:30,069 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-22 21:43:30,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 4842 events. 2207/4842 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39100 event pairs, 1390 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 7849. Up to 2949 conditions per place. [2024-11-22 21:43:30,128 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-11-22 21:43:30,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 120 transitions, 442 flow [2024-11-22 21:43:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:43:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:43:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 510 transitions. [2024-11-22 21:43:30,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-22 21:43:30,131 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 7 states and 510 transitions. [2024-11-22 21:43:30,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 120 transitions, 442 flow [2024-11-22 21:43:30,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 120 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:30,133 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 343 flow [2024-11-22 21:43:30,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-11-22 21:43:30,134 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-22 21:43:30,135 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 343 flow [2024-11-22 21:43:30,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 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) [2024-11-22 21:43:30,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:30,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:30,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:43:30,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:30,337 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:30,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-11-22 21:43:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047705842] [2024-11-22 21:43:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:30,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047705842] [2024-11-22 21:43:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047705842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230051833] [2024-11-22 21:43:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:30,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:30,551 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) [2024-11-22 21:43:30,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:43:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:30,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:43:30,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:30,661 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 [2024-11-22 21:43:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:30,666 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:43:30,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230051833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:30,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:43:30,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-22 21:43:30,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067013023] [2024-11-22 21:43:30,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:30,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:30,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:43:30,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2024-11-22 21:43:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:30,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:31,073 INFO L124 PetriNetUnfolderBase]: 2208/4846 cut-off events. [2024-11-22 21:43:31,073 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-22 21:43:31,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7917 conditions, 4846 events. 2208/4846 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39145 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7865. Up to 2966 conditions per place. [2024-11-22 21:43:31,101 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-11-22 21:43:31,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 485 flow [2024-11-22 21:43:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-22 21:43:31,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-22 21:43:31,103 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 343 flow. Second operand 4 states and 317 transitions. [2024-11-22 21:43:31,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 123 transitions, 485 flow [2024-11-22 21:43:31,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 123 transitions, 465 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:43:31,105 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 344 flow [2024-11-22 21:43:31,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-11-22 21:43:31,106 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-22 21:43:31,106 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 344 flow [2024-11-22 21:43:31,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2024-11-22 21:43:31,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:31,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:31,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:43:31,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:31,311 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:31,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-11-22 21:43:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818017722] [2024-11-22 21:43:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:31,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:31,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818017722] [2024-11-22 21:43:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818017722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:31,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:43:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515692269] [2024-11-22 21:43:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:31,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:43:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:43:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:43:31,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:31,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-11-22 21:43:31,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:31,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:31,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:31,667 INFO L124 PetriNetUnfolderBase]: 2208/4842 cut-off events. [2024-11-22 21:43:31,667 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-22 21:43:31,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7909 conditions, 4842 events. 2208/4842 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39120 event pairs, 1390 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 7860. Up to 2954 conditions per place. [2024-11-22 21:43:31,689 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 62 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-11-22 21:43:31,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 466 flow [2024-11-22 21:43:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-11-22 21:43:31,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-22 21:43:31,690 INFO L175 Difference]: Start difference. First operand has 119 places, 122 transitions, 344 flow. Second operand 3 states and 248 transitions. [2024-11-22 21:43:31,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 466 flow [2024-11-22 21:43:31,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:31,692 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 337 flow [2024-11-22 21:43:31,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-11-22 21:43:31,692 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-22 21:43:31,692 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 337 flow [2024-11-22 21:43:31,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2024-11-22 21:43:31,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:31,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:31,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:43:31,693 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:31,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-11-22 21:43:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070369209] [2024-11-22 21:43:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:31,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070369209] [2024-11-22 21:43:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070369209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:31,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:31,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:31,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126454689] [2024-11-22 21:43:31,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:31,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:31,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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) [2024-11-22 21:43:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:32,076 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-22 21:43:32,076 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-22 21:43:32,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 4841 events. 2207/4841 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39089 event pairs, 1390 based on Foata normal form. 1/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2962 conditions per place. [2024-11-22 21:43:32,095 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 61 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-22 21:43:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 463 flow [2024-11-22 21:43:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-22 21:43:32,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-22 21:43:32,096 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 337 flow. Second operand 4 states and 325 transitions. [2024-11-22 21:43:32,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 463 flow [2024-11-22 21:43:32,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:32,098 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 335 flow [2024-11-22 21:43:32,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=335, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2024-11-22 21:43:32,098 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2024-11-22 21:43:32,099 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 335 flow [2024-11-22 21:43:32,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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) [2024-11-22 21:43:32,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:32,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:32,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:43:32,099 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:32,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:32,100 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-11-22 21:43:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:32,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986101709] [2024-11-22 21:43:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:32,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:32,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986101709] [2024-11-22 21:43:32,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986101709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:32,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884035156] [2024-11-22 21:43:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:32,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:32,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:32,210 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) [2024-11-22 21:43:32,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:43:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:32,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:43:32,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:32,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:43:32,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884035156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:32,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:32,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:43:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768496703] [2024-11-22 21:43:32,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:32,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:43:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:43:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:43:32,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:32,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 335 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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) [2024-11-22 21:43:32,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:32,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:32,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:33,202 INFO L124 PetriNetUnfolderBase]: 4400/9622 cut-off events. [2024-11-22 21:43:33,203 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-22 21:43:33,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15695 conditions, 9622 events. 4400/9622 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 87426 event pairs, 2784 based on Foata normal form. 1/7501 useless extension candidates. Maximal degree in co-relation 7850. Up to 2943 conditions per place. [2024-11-22 21:43:33,246 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 87 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-11-22 21:43:33,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 171 transitions, 716 flow [2024-11-22 21:43:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:43:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:43:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-11-22 21:43:33,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-11-22 21:43:33,248 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 335 flow. Second operand 9 states and 716 transitions. [2024-11-22 21:43:33,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 171 transitions, 716 flow [2024-11-22 21:43:33,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 706 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:33,252 INFO L231 Difference]: Finished difference. Result has 126 places, 133 transitions, 496 flow [2024-11-22 21:43:33,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=496, PETRI_PLACES=126, PETRI_TRANSITIONS=133} [2024-11-22 21:43:33,252 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 12 predicate places. [2024-11-22 21:43:33,252 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 133 transitions, 496 flow [2024-11-22 21:43:33,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 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) [2024-11-22 21:43:33,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:33,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:33,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:33,456 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,SelfDestructingSolverStorable11 [2024-11-22 21:43:33,457 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:33,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-11-22 21:43:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:33,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103472420] [2024-11-22 21:43:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:33,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:33,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:33,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103472420] [2024-11-22 21:43:33,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103472420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:33,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085055615] [2024-11-22 21:43:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:33,672 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) [2024-11-22 21:43:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:43:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:33,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:43:33,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:33,798 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 [2024-11-22 21:43:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:33,809 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:43:33,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085055615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:33,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:43:33,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-22 21:43:33,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299572150] [2024-11-22 21:43:33,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:33,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:43:33,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:33,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 133 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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) [2024-11-22 21:43:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:33,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:34,437 INFO L124 PetriNetUnfolderBase]: 4412/9676 cut-off events. [2024-11-22 21:43:34,437 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-22 21:43:34,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15825 conditions, 9676 events. 4412/9676 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88219 event pairs, 2780 based on Foata normal form. 0/7455 useless extension candidates. Maximal degree in co-relation 7886. Up to 5924 conditions per place. [2024-11-22 21:43:34,484 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 79 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-22 21:43:34,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 136 transitions, 670 flow [2024-11-22 21:43:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-22 21:43:34,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-22 21:43:34,485 INFO L175 Difference]: Start difference. First operand has 126 places, 133 transitions, 496 flow. Second operand 4 states and 317 transitions. [2024-11-22 21:43:34,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 136 transitions, 670 flow [2024-11-22 21:43:34,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 136 transitions, 666 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:43:34,487 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 516 flow [2024-11-22 21:43:34,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=516, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-11-22 21:43:34,488 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 15 predicate places. [2024-11-22 21:43:34,488 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 516 flow [2024-11-22 21:43:34,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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) [2024-11-22 21:43:34,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:34,488 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:34,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:43:34,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:34,689 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:34,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1364202777, now seen corresponding path program 2 times [2024-11-22 21:43:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734097581] [2024-11-22 21:43:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:34,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:34,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:43:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734097581] [2024-11-22 21:43:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734097581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209198045] [2024-11-22 21:43:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:34,835 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) [2024-11-22 21:43:34,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:43:34,939 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:34,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:34,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:43:34,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:34,957 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 [2024-11-22 21:43:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:43:35,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:43:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209198045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:35,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:43:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101068598] [2024-11-22 21:43:35,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:35,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:43:35,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:43:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:43:35,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:35,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 516 flow. Second operand has 13 states, 13 states have (on average 67.53846153846153) internal successors, (878), 13 states have internal predecessors, (878), 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) [2024-11-22 21:43:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:35,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:36,231 INFO L124 PetriNetUnfolderBase]: 4412/9675 cut-off events. [2024-11-22 21:43:36,231 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-22 21:43:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15839 conditions, 9675 events. 4412/9675 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88254 event pairs, 2780 based on Foata normal form. 0/7459 useless extension candidates. Maximal degree in co-relation 7891. Up to 5919 conditions per place. [2024-11-22 21:43:36,274 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 73 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-11-22 21:43:36,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 135 transitions, 682 flow [2024-11-22 21:43:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:43:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:43:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 510 transitions. [2024-11-22 21:43:36,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-22 21:43:36,275 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 516 flow. Second operand 7 states and 510 transitions. [2024-11-22 21:43:36,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 135 transitions, 682 flow [2024-11-22 21:43:36,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 135 transitions, 676 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:36,278 INFO L231 Difference]: Finished difference. Result has 132 places, 135 transitions, 530 flow [2024-11-22 21:43:36,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=132, PETRI_TRANSITIONS=135} [2024-11-22 21:43:36,278 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 18 predicate places. [2024-11-22 21:43:36,278 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 135 transitions, 530 flow [2024-11-22 21:43:36,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.53846153846153) internal successors, (878), 13 states have internal predecessors, (878), 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) [2024-11-22 21:43:36,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:36,279 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:36,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:36,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:36,483 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:36,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 261377450, now seen corresponding path program 1 times [2024-11-22 21:43:36,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:36,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067240539] [2024-11-22 21:43:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:36,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:36,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067240539] [2024-11-22 21:43:36,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067240539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:36,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745279976] [2024-11-22 21:43:36,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:36,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:36,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:36,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 135 transitions, 530 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2024-11-22 21:43:36,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:36,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:36,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:37,347 INFO L124 PetriNetUnfolderBase]: 4410/9673 cut-off events. [2024-11-22 21:43:37,348 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-22 21:43:37,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 9673 events. 4410/9673 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88119 event pairs, 2780 based on Foata normal form. 2/7463 useless extension candidates. Maximal degree in co-relation 7890. Up to 5917 conditions per place. [2024-11-22 21:43:37,410 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 77 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2024-11-22 21:43:37,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 135 transitions, 690 flow [2024-11-22 21:43:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-22 21:43:37,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-22 21:43:37,412 INFO L175 Difference]: Start difference. First operand has 132 places, 135 transitions, 530 flow. Second operand 4 states and 325 transitions. [2024-11-22 21:43:37,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 135 transitions, 690 flow [2024-11-22 21:43:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 135 transitions, 656 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:37,415 INFO L231 Difference]: Finished difference. Result has 129 places, 134 transitions, 500 flow [2024-11-22 21:43:37,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=129, PETRI_TRANSITIONS=134} [2024-11-22 21:43:37,415 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 15 predicate places. [2024-11-22 21:43:37,415 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 134 transitions, 500 flow [2024-11-22 21:43:37,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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) [2024-11-22 21:43:37,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:37,416 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:37,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:43:37,416 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:37,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -487233991, now seen corresponding path program 1 times [2024-11-22 21:43:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765674413] [2024-11-22 21:43:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765674413] [2024-11-22 21:43:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765674413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932716775] [2024-11-22 21:43:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:37,528 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) [2024-11-22 21:43:37,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:43:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:37,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:43:37,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:37,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:43:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932716775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:37,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:37,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:43:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395606345] [2024-11-22 21:43:37,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:37,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:43:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:43:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:43:37,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:37,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 134 transitions, 500 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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) [2024-11-22 21:43:37,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:37,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:37,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:38,956 INFO L124 PetriNetUnfolderBase]: 8791/19219 cut-off events. [2024-11-22 21:43:38,957 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-22 21:43:39,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31369 conditions, 19219 events. 8791/19219 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 194893 event pairs, 5568 based on Foata normal form. 2/14991 useless extension candidates. Maximal degree in co-relation 15657. Up to 5882 conditions per place. [2024-11-22 21:43:39,067 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 98 selfloop transitions, 36 changer transitions 0/188 dead transitions. [2024-11-22 21:43:39,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 188 transitions, 957 flow [2024-11-22 21:43:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:43:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:43:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2024-11-22 21:43:39,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2024-11-22 21:43:39,069 INFO L175 Difference]: Start difference. First operand has 129 places, 134 transitions, 500 flow. Second operand 9 states and 713 transitions. [2024-11-22 21:43:39,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 188 transitions, 957 flow [2024-11-22 21:43:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 943 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:39,072 INFO L231 Difference]: Finished difference. Result has 138 places, 146 transitions, 691 flow [2024-11-22 21:43:39,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=691, PETRI_PLACES=138, PETRI_TRANSITIONS=146} [2024-11-22 21:43:39,073 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 24 predicate places. [2024-11-22 21:43:39,073 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 146 transitions, 691 flow [2024-11-22 21:43:39,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 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) [2024-11-22 21:43:39,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:39,073 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:39,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:39,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:43:39,274 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:39,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2075616908, now seen corresponding path program 1 times [2024-11-22 21:43:39,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:39,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233064188] [2024-11-22 21:43:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:39,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:43:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233064188] [2024-11-22 21:43:39,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233064188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:39,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:39,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:39,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812996979] [2024-11-22 21:43:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:39,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:43:39,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:43:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:43:39,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:39,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 146 transitions, 691 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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) [2024-11-22 21:43:39,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:39,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:39,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:40,803 INFO L124 PetriNetUnfolderBase]: 8811/19323 cut-off events. [2024-11-22 21:43:40,803 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-11-22 21:43:40,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31578 conditions, 19323 events. 8811/19323 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 195821 event pairs, 5560 based on Foata normal form. 0/14897 useless extension candidates. Maximal degree in co-relation 15754. Up to 11819 conditions per place. [2024-11-22 21:43:40,894 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 92 selfloop transitions, 4 changer transitions 0/148 dead transitions. [2024-11-22 21:43:40,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 148 transitions, 887 flow [2024-11-22 21:43:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-22 21:43:40,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-22 21:43:40,895 INFO L175 Difference]: Start difference. First operand has 138 places, 146 transitions, 691 flow. Second operand 4 states and 316 transitions. [2024-11-22 21:43:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 148 transitions, 887 flow [2024-11-22 21:43:40,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 148 transitions, 885 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-22 21:43:40,898 INFO L231 Difference]: Finished difference. Result has 142 places, 147 transitions, 708 flow [2024-11-22 21:43:40,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=708, PETRI_PLACES=142, PETRI_TRANSITIONS=147} [2024-11-22 21:43:40,899 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 28 predicate places. [2024-11-22 21:43:40,899 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 147 transitions, 708 flow [2024-11-22 21:43:40,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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) [2024-11-22 21:43:40,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:40,899 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:40,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:43:40,899 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:40,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 560678040, now seen corresponding path program 2 times [2024-11-22 21:43:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211995406] [2024-11-22 21:43:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:40,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:40,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:43:41,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211995406] [2024-11-22 21:43:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211995406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:41,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537997750] [2024-11-22 21:43:41,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:41,055 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) [2024-11-22 21:43:41,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:43:41,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:41,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:41,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:43:41,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:41,159 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 [2024-11-22 21:43:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:43:41,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:43:41,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537997750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:41,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:41,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:43:41,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52785219] [2024-11-22 21:43:41,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:41,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:43:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:43:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:43:41,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:41,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 147 transitions, 708 flow. Second operand has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 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) [2024-11-22 21:43:41,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:41,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:43,272 INFO L124 PetriNetUnfolderBase]: 8811/19321 cut-off events. [2024-11-22 21:43:43,272 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-11-22 21:43:43,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31597 conditions, 19321 events. 8811/19321 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 195871 event pairs, 5560 based on Foata normal form. 0/14901 useless extension candidates. Maximal degree in co-relation 15762. Up to 11809 conditions per place. [2024-11-22 21:43:43,399 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 83 selfloop transitions, 12 changer transitions 0/147 dead transitions. [2024-11-22 21:43:43,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 147 transitions, 898 flow [2024-11-22 21:43:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:43:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:43:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2024-11-22 21:43:43,401 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6059523809523809 [2024-11-22 21:43:43,401 INFO L175 Difference]: Start difference. First operand has 142 places, 147 transitions, 708 flow. Second operand 7 states and 509 transitions. [2024-11-22 21:43:43,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 147 transitions, 898 flow [2024-11-22 21:43:43,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 147 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:43,404 INFO L231 Difference]: Finished difference. Result has 145 places, 147 transitions, 727 flow [2024-11-22 21:43:43,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=145, PETRI_TRANSITIONS=147} [2024-11-22 21:43:43,405 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 31 predicate places. [2024-11-22 21:43:43,405 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 147 transitions, 727 flow [2024-11-22 21:43:43,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 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) [2024-11-22 21:43:43,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:43,405 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:43,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:43:43,606 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,SelfDestructingSolverStorable17 [2024-11-22 21:43:43,606 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:43,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1803065764, now seen corresponding path program 1 times [2024-11-22 21:43:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235184627] [2024-11-22 21:43:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235184627] [2024-11-22 21:43:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235184627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235041404] [2024-11-22 21:43:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:43,821 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) [2024-11-22 21:43:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:43:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:43,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:43:43,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:43,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235041404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:44,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:44,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:43:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191240671] [2024-11-22 21:43:44,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:44,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:43:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:43:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:43:44,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-22 21:43:44,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 147 transitions, 727 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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) [2024-11-22 21:43:44,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:44,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-22 21:43:44,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:47,018 INFO L124 PetriNetUnfolderBase]: 17571/38405 cut-off events. [2024-11-22 21:43:47,018 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-11-22 21:43:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62737 conditions, 38405 events. 17571/38405 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 428329 event pairs, 11136 based on Foata normal form. 4/29961 useless extension candidates. Maximal degree in co-relation 31334. Up to 11760 conditions per place. [2024-11-22 21:43:47,250 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 110 selfloop transitions, 44 changer transitions 0/207 dead transitions. [2024-11-22 21:43:47,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 207 transitions, 1327 flow [2024-11-22 21:43:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:43:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:43:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2024-11-22 21:43:47,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6677083333333333 [2024-11-22 21:43:47,252 INFO L175 Difference]: Start difference. First operand has 145 places, 147 transitions, 727 flow. Second operand 8 states and 641 transitions. [2024-11-22 21:43:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 207 transitions, 1327 flow [2024-11-22 21:43:47,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 1245 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:47,256 INFO L231 Difference]: Finished difference. Result has 151 places, 161 transitions, 963 flow [2024-11-22 21:43:47,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=151, PETRI_TRANSITIONS=161} [2024-11-22 21:43:47,256 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 37 predicate places. [2024-11-22 21:43:47,256 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 161 transitions, 963 flow [2024-11-22 21:43:47,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 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) [2024-11-22 21:43:47,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:47,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:47,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:47,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:47,458 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:47,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1874635201, now seen corresponding path program 1 times [2024-11-22 21:43:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096480318] [2024-11-22 21:43:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:43:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096480318] [2024-11-22 21:43:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096480318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:47,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551382259] [2024-11-22 21:43:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:47,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:43:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:43:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:43:47,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 120 [2024-11-22 21:43:47,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 161 transitions, 963 flow. Second operand has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 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) [2024-11-22 21:43:47,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:47,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 120 [2024-11-22 21:43:47,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:51,187 INFO L124 PetriNetUnfolderBase]: 22603/43949 cut-off events. [2024-11-22 21:43:51,187 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-11-22 21:43:51,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75162 conditions, 43949 events. 22603/43949 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 456279 event pairs, 14840 based on Foata normal form. 0/37165 useless extension candidates. Maximal degree in co-relation 37541. Up to 30272 conditions per place. [2024-11-22 21:43:51,550 INFO L140 encePairwiseOnDemand]: 113/120 looper letters, 103 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2024-11-22 21:43:51,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 157 transitions, 1175 flow [2024-11-22 21:43:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:43:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:43:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 351 transitions. [2024-11-22 21:43:51,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-11-22 21:43:51,551 INFO L175 Difference]: Start difference. First operand has 151 places, 161 transitions, 963 flow. Second operand 5 states and 351 transitions. [2024-11-22 21:43:51,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 157 transitions, 1175 flow [2024-11-22 21:43:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 157 transitions, 1173 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-22 21:43:51,558 INFO L231 Difference]: Finished difference. Result has 151 places, 157 transitions, 967 flow [2024-11-22 21:43:51,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=151, PETRI_TRANSITIONS=157} [2024-11-22 21:43:51,559 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 37 predicate places. [2024-11-22 21:43:51,559 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 157 transitions, 967 flow [2024-11-22 21:43:51,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 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) [2024-11-22 21:43:51,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:51,559 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:51,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:43:51,559 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:51,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1162836769, now seen corresponding path program 2 times [2024-11-22 21:43:51,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:51,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152551960] [2024-11-22 21:43:51,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:51,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:51,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:51,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:43:51,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152551960] [2024-11-22 21:43:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152551960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:51,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001451693] [2024-11-22 21:43:51,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:51,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:51,783 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) [2024-11-22 21:43:51,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:43:51,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:51,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:51,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:43:51,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:51,928 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 [2024-11-22 21:43:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:43:52,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:43:52,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001451693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:52,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:52,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2024-11-22 21:43:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344645283] [2024-11-22 21:43:52,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:52,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:43:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:43:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:43:52,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-22 21:43:52,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 157 transitions, 967 flow. Second operand has 14 states, 14 states have (on average 68.42857142857143) internal successors, (958), 14 states have internal predecessors, (958), 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) [2024-11-22 21:43:52,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:52,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-22 21:43:52,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:55,659 INFO L124 PetriNetUnfolderBase]: 17611/37433 cut-off events. [2024-11-22 21:43:55,660 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-11-22 21:43:55,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61874 conditions, 37433 events. 17611/37433 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 1920. Compared 406971 event pairs, 11120 based on Foata normal form. 0/29761 useless extension candidates. Maximal degree in co-relation 30895. Up to 23555 conditions per place. [2024-11-22 21:43:55,936 INFO L140 encePairwiseOnDemand]: 109/120 looper letters, 84 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-11-22 21:43:55,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 157 transitions, 1185 flow [2024-11-22 21:43:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:43:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:43:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 579 transitions. [2024-11-22 21:43:55,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-11-22 21:43:55,937 INFO L175 Difference]: Start difference. First operand has 151 places, 157 transitions, 967 flow. Second operand 8 states and 579 transitions. [2024-11-22 21:43:55,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 157 transitions, 1185 flow [2024-11-22 21:43:55,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 157 transitions, 1175 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:55,941 INFO L231 Difference]: Finished difference. Result has 154 places, 157 transitions, 1007 flow [2024-11-22 21:43:55,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=157} [2024-11-22 21:43:55,942 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2024-11-22 21:43:55,942 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 157 transitions, 1007 flow [2024-11-22 21:43:55,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.42857142857143) internal successors, (958), 14 states have internal predecessors, (958), 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) [2024-11-22 21:43:55,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:55,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:55,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:56,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:43:56,143 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:43:56,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1874635202, now seen corresponding path program 1 times [2024-11-22 21:43:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532801910] [2024-11-22 21:43:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:43:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:56,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532801910] [2024-11-22 21:43:56,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532801910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:56,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013323947] [2024-11-22 21:43:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:56,566 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) [2024-11-22 21:43:56,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:43:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:56,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:43:56,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:56,817 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 [2024-11-22 21:43:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:43:56,870 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 [2024-11-22 21:43:56,886 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:43:56,887 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 [2024-11-22 21:43:56,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:43:56,928 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 [2024-11-22 21:43:56,944 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:43:56,944 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 [2024-11-22 21:43:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:43:56,968 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 [2024-11-22 21:43:56,982 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:43:56,982 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 [2024-11-22 21:43:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:43:57,006 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 [2024-11-22 21:43:57,019 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 21:43:57,019 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 [2024-11-22 21:43:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:43:57,078 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 [2024-11-22 21:43:57,089 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-22 21:43:57,089 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 [2024-11-22 21:43:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:43:57,122 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:43:57,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013323947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:57,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:43:57,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-22 21:43:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778301396] [2024-11-22 21:43:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:57,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:43:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:43:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:43:57,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 120 [2024-11-22 21:43:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 157 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 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) [2024-11-22 21:43:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 120 [2024-11-22 21:43:57,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:00,544 INFO L124 PetriNetUnfolderBase]: 22603/42673 cut-off events. [2024-11-22 21:44:00,545 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2024-11-22 21:44:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73941 conditions, 42673 events. 22603/42673 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 2130. Compared 427640 event pairs, 14840 based on Foata normal form. 0/35889 useless extension candidates. Maximal degree in co-relation 36928. Up to 30314 conditions per place. [2024-11-22 21:44:00,841 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 108 selfloop transitions, 3 changer transitions 0/153 dead transitions. [2024-11-22 21:44:00,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 153 transitions, 1221 flow [2024-11-22 21:44:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:44:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:44:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 276 transitions. [2024-11-22 21:44:00,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-22 21:44:00,842 INFO L175 Difference]: Start difference. First operand has 154 places, 157 transitions, 1007 flow. Second operand 4 states and 276 transitions. [2024-11-22 21:44:00,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 153 transitions, 1221 flow [2024-11-22 21:44:00,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 153 transitions, 1153 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:44:00,846 INFO L231 Difference]: Finished difference. Result has 146 places, 153 transitions, 937 flow [2024-11-22 21:44:00,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=937, PETRI_PLACES=146, PETRI_TRANSITIONS=153} [2024-11-22 21:44:00,847 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 32 predicate places. [2024-11-22 21:44:00,847 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 153 transitions, 937 flow [2024-11-22 21:44:00,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 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) [2024-11-22 21:44:00,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:00,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:00,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 21:44:01,051 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,SelfDestructingSolverStorable21 [2024-11-22 21:44:01,052 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:44:01,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2015849445, now seen corresponding path program 1 times [2024-11-22 21:44:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051638236] [2024-11-22 21:44:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:44:01,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:01,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051638236] [2024-11-22 21:44:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051638236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:01,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:44:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193280952] [2024-11-22 21:44:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:01,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:01,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 120 [2024-11-22 21:44:01,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 153 transitions, 937 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 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) [2024-11-22 21:44:01,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:01,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 120 [2024-11-22 21:44:01,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:04,358 INFO L124 PetriNetUnfolderBase]: 19971/39129 cut-off events. [2024-11-22 21:44:04,358 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2024-11-22 21:44:04,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66793 conditions, 39129 events. 19971/39129 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 1932. Compared 399056 event pairs, 12896 based on Foata normal form. 0/33757 useless extension candidates. Maximal degree in co-relation 33355. Up to 26752 conditions per place. [2024-11-22 21:44:04,646 INFO L140 encePairwiseOnDemand]: 113/120 looper letters, 101 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-11-22 21:44:04,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 149 transitions, 1149 flow [2024-11-22 21:44:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2024-11-22 21:44:04,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-22 21:44:04,648 INFO L175 Difference]: Start difference. First operand has 146 places, 153 transitions, 937 flow. Second operand 5 states and 355 transitions. [2024-11-22 21:44:04,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 149 transitions, 1149 flow [2024-11-22 21:44:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 149 transitions, 1145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:44:04,652 INFO L231 Difference]: Finished difference. Result has 144 places, 149 transitions, 943 flow [2024-11-22 21:44:04,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=943, PETRI_PLACES=144, PETRI_TRANSITIONS=149} [2024-11-22 21:44:04,652 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 30 predicate places. [2024-11-22 21:44:04,652 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 149 transitions, 943 flow [2024-11-22 21:44:04,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 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) [2024-11-22 21:44:04,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:04,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:04,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-22 21:44:04,653 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:44:04,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2015849444, now seen corresponding path program 1 times [2024-11-22 21:44:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:04,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158169209] [2024-11-22 21:44:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:44:05,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158169209] [2024-11-22 21:44:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158169209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:44:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813913712] [2024-11-22 21:44:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:05,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:44:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:44:05,101 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) [2024-11-22 21:44:05,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:44:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:05,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:44:05,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:44:05,220 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 [2024-11-22 21:44:05,224 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 [2024-11-22 21:44:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:05,276 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 [2024-11-22 21:44:05,287 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 21:44:05,288 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 [2024-11-22 21:44:05,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:05,346 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 [2024-11-22 21:44:05,367 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-22 21:44:05,367 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 [2024-11-22 21:44:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:05,405 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 [2024-11-22 21:44:05,430 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-22 21:44:05,430 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 [2024-11-22 21:44:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:44:05,467 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 [2024-11-22 21:44:05,479 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-22 21:44:05,479 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 [2024-11-22 21:44:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:44:05,514 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:44:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813913712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:05,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:44:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-22 21:44:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886628982] [2024-11-22 21:44:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:05,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:44:05,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:44:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:44:05,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 120 [2024-11-22 21:44:05,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 149 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 60.142857142857146) internal successors, (421), 7 states have internal predecessors, (421), 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) [2024-11-22 21:44:05,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:05,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 120 [2024-11-22 21:44:05,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:08,426 INFO L124 PetriNetUnfolderBase]: 17611/34785 cut-off events. [2024-11-22 21:44:08,426 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-11-22 21:44:08,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59205 conditions, 34785 events. 17611/34785 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 1694. Compared 350901 event pairs, 11120 based on Foata normal form. 1264/30669 useless extension candidates. Maximal degree in co-relation 29561. Up to 23580 conditions per place. [2024-11-22 21:44:08,666 INFO L140 encePairwiseOnDemand]: 113/120 looper letters, 102 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2024-11-22 21:44:08,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 145 transitions, 1153 flow [2024-11-22 21:44:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:44:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:44:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 339 transitions. [2024-11-22 21:44:08,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-11-22 21:44:08,667 INFO L175 Difference]: Start difference. First operand has 144 places, 149 transitions, 943 flow. Second operand 5 states and 339 transitions. [2024-11-22 21:44:08,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 145 transitions, 1153 flow [2024-11-22 21:44:08,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1139 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:44:08,670 INFO L231 Difference]: Finished difference. Result has 141 places, 145 transitions, 935 flow [2024-11-22 21:44:08,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=935, PETRI_PLACES=141, PETRI_TRANSITIONS=145} [2024-11-22 21:44:08,670 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 27 predicate places. [2024-11-22 21:44:08,671 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 145 transitions, 935 flow [2024-11-22 21:44:08,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.142857142857146) internal successors, (421), 7 states have internal predecessors, (421), 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) [2024-11-22 21:44:08,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:08,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:08,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:44:08,875 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,SelfDestructingSolverStorable23 [2024-11-22 21:44:08,876 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-22 21:44:08,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1933178116, now seen corresponding path program 1 times [2024-11-22 21:44:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075224735] [2024-11-22 21:44:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:44:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075224735] [2024-11-22 21:44:09,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075224735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:09,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:09,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:44:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211071084] [2024-11-22 21:44:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:09,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:09,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 120 [2024-11-22 21:44:09,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 145 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2024-11-22 21:44:09,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:09,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 120 [2024-11-22 21:44:09,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand