./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 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-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.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:02,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:02,787 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:02,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:02,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:02,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:02,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:02,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:02,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:02,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:02,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:02,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:02,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:02,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:02,826 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:02,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:02,826 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:02,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:02,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:02,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:02,827 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:02,831 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:02,831 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:02,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:02,832 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:02,832 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:02,834 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:02,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:02,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:02,835 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:02,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:02,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:02,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:02,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:02,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:02,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:02,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:02,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-11-17 03:33:03,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:03,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:03,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:03,181 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:03,182 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:03,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-17 03:33:04,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:04,765 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:04,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-17 03:33:04,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0909f5819/f537524a9c5a46fbb9980ae1da3e01fd/FLAG4a2c68cdd [2024-11-17 03:33:04,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0909f5819/f537524a9c5a46fbb9980ae1da3e01fd [2024-11-17 03:33:04,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:04,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:04,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:04,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:04,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:04,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1555e23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04, skipping insertion in model container [2024-11-17 03:33:04,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,829 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:05,085 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:05,093 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:05,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:05,109 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:05,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:05,169 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:05,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05 WrapperNode [2024-11-17 03:33:05,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:05,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:05,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:05,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:05,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,222 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 420 [2024-11-17 03:33:05,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:05,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:05,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:05,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:05,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,243 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,277 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 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]. [2024-11-17 03:33:05,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,293 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:05,305 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:05,305 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:05,305 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:05,306 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (1/1) ... [2024-11-17 03:33:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:05,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:33:05,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:33:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:33:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:33:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:33:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:05,411 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:33:05,572 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:05,574 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:06,323 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:06,323 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:06,778 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:06,778 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:06,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:06 BoogieIcfgContainer [2024-11-17 03:33:06,779 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:06,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:06,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:06,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:06,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:04" (1/3) ... [2024-11-17 03:33:06,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ebbfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:06, skipping insertion in model container [2024-11-17 03:33:06,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:05" (2/3) ... [2024-11-17 03:33:06,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ebbfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:06, skipping insertion in model container [2024-11-17 03:33:06,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:06" (3/3) ... [2024-11-17 03:33:06,787 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-11-17 03:33:06,800 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:06,800 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-17 03:33:06,800 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:06,885 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:33:06,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 138 transitions, 297 flow [2024-11-17 03:33:06,983 INFO L124 PetriNetUnfolderBase]: 18/135 cut-off events. [2024-11-17 03:33:06,984 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:06,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 18/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 410 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2024-11-17 03:33:06,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 138 transitions, 297 flow [2024-11-17 03:33:06,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 134 transitions, 286 flow [2024-11-17 03:33:07,010 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:07,018 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;@f405292, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:07,019 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-17 03:33:07,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:07,024 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:07,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:07,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:07,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:07,026 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:07,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 38489048, now seen corresponding path program 1 times [2024-11-17 03:33:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695777694] [2024-11-17 03:33:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695777694] [2024-11-17 03:33:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695777694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:07,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:07,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137722946] [2024-11-17 03:33:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:07,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:07,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:07,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:07,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:07,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:08,417 INFO L124 PetriNetUnfolderBase]: 2263/5005 cut-off events. [2024-11-17 03:33:08,418 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-11-17 03:33:08,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 5005 events. 2263/5005 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40697 event pairs, 1414 based on Foata normal form. 7/3863 useless extension candidates. Maximal degree in co-relation 7651. Up to 3012 conditions per place. [2024-11-17 03:33:08,477 INFO L140 encePairwiseOnDemand]: 126/138 looper letters, 48 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2024-11-17 03:33:08,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 364 flow [2024-11-17 03:33:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2024-11-17 03:33:08,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-11-17 03:33:08,498 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 286 flow. Second operand 3 states and 291 transitions. [2024-11-17 03:33:08,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 364 flow [2024-11-17 03:33:08,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 123 transitions, 352 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:33:08,511 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 256 flow [2024-11-17 03:33:08,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-11-17 03:33:08,517 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -9 predicate places. [2024-11-17 03:33:08,517 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 256 flow [2024-11-17 03:33:08,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:08,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:08,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:08,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:08,519 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:08,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 38489049, now seen corresponding path program 1 times [2024-11-17 03:33:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621182625] [2024-11-17 03:33:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621182625] [2024-11-17 03:33:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621182625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606465456] [2024-11-17 03:33:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:08,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:09,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:09,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:09,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:09,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:09,754 INFO L124 PetriNetUnfolderBase]: 2263/5008 cut-off events. [2024-11-17 03:33:09,754 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-17 03:33:09,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 5008 events. 2263/5008 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40712 event pairs, 1414 based on Foata normal form. 0/3853 useless extension candidates. Maximal degree in co-relation 8044. Up to 3027 conditions per place. [2024-11-17 03:33:09,801 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 56 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2024-11-17 03:33:09,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 125 transitions, 376 flow [2024-11-17 03:33:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-17 03:33:09,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-11-17 03:33:09,804 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 256 flow. Second operand 3 states and 282 transitions. [2024-11-17 03:33:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 125 transitions, 376 flow [2024-11-17 03:33:09,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:09,808 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 266 flow [2024-11-17 03:33:09,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-11-17 03:33:09,809 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -8 predicate places. [2024-11-17 03:33:09,809 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 266 flow [2024-11-17 03:33:09,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:09,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:09,810 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:09,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:09,810 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:09,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash -127788765, now seen corresponding path program 1 times [2024-11-17 03:33:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:09,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016418672] [2024-11-17 03:33:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:10,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:10,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016418672] [2024-11-17 03:33:10,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016418672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:10,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423046998] [2024-11-17 03:33:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:10,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:10,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:33:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:10,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:33:10,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:10,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:10,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423046998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:10,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:33:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96791444] [2024-11-17 03:33:10,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:10,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:33:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:33:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:33:11,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:11,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:11,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:11,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:11,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:11,980 INFO L124 PetriNetUnfolderBase]: 2264/5012 cut-off events. [2024-11-17 03:33:11,980 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-17 03:33:11,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 5012 events. 2264/5012 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40708 event pairs, 1414 based on Foata normal form. 0/3859 useless extension candidates. Maximal degree in co-relation 8088. Up to 3021 conditions per place. [2024-11-17 03:33:12,016 INFO L140 encePairwiseOnDemand]: 129/138 looper letters, 49 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-17 03:33:12,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 398 flow [2024-11-17 03:33:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:33:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:33:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2024-11-17 03:33:12,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5932971014492754 [2024-11-17 03:33:12,019 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 266 flow. Second operand 8 states and 655 transitions. [2024-11-17 03:33:12,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 398 flow [2024-11-17 03:33:12,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 128 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:12,022 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 296 flow [2024-11-17 03:33:12,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-11-17 03:33:12,023 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2024-11-17 03:33:12,023 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 296 flow [2024-11-17 03:33:12,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:12,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:12,024 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:12,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:12,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,225 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:12,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1613563637, now seen corresponding path program 1 times [2024-11-17 03:33:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252286094] [2024-11-17 03:33:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252286094] [2024-11-17 03:33:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252286094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:12,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:12,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169438426] [2024-11-17 03:33:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:12,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:12,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:12,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:12,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:13,155 INFO L124 PetriNetUnfolderBase]: 2265/5017 cut-off events. [2024-11-17 03:33:13,156 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-17 03:33:13,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 5017 events. 2265/5017 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40782 event pairs, 1414 based on Foata normal form. 0/3866 useless extension candidates. Maximal degree in co-relation 8081. Up to 3025 conditions per place. [2024-11-17 03:33:13,200 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 54 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2024-11-17 03:33:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 130 transitions, 424 flow [2024-11-17 03:33:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-17 03:33:13,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-17 03:33:13,203 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 296 flow. Second operand 4 states and 366 transitions. [2024-11-17 03:33:13,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 130 transitions, 424 flow [2024-11-17 03:33:13,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:13,208 INFO L231 Difference]: Finished difference. Result has 124 places, 129 transitions, 307 flow [2024-11-17 03:33:13,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=124, PETRI_TRANSITIONS=129} [2024-11-17 03:33:13,211 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -2 predicate places. [2024-11-17 03:33:13,212 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 129 transitions, 307 flow [2024-11-17 03:33:13,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:13,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:13,212 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:13,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:33:13,212 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:13,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -399107829, now seen corresponding path program 1 times [2024-11-17 03:33:13,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712186540] [2024-11-17 03:33:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712186540] [2024-11-17 03:33:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712186540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123044166] [2024-11-17 03:33:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:13,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:13,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:13,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:13,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:33:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:13,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:13,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:13,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:33:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:13,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123044166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:14,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:14,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:33:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020270805] [2024-11-17 03:33:14,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:14,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:33:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:33:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:15,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:15,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 129 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 75.76923076923077) internal successors, (985), 13 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:15,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:15,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:15,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:16,113 INFO L124 PetriNetUnfolderBase]: 2266/5021 cut-off events. [2024-11-17 03:33:16,114 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-17 03:33:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 5021 events. 2266/5021 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40791 event pairs, 1414 based on Foata normal form. 0/3867 useless extension candidates. Maximal degree in co-relation 8093. Up to 3017 conditions per place. [2024-11-17 03:33:16,157 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 49 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-11-17 03:33:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 135 transitions, 459 flow [2024-11-17 03:33:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 810 transitions. [2024-11-17 03:33:16,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-11-17 03:33:16,161 INFO L175 Difference]: Start difference. First operand has 124 places, 129 transitions, 307 flow. Second operand 10 states and 810 transitions. [2024-11-17 03:33:16,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 135 transitions, 459 flow [2024-11-17 03:33:16,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:16,164 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 347 flow [2024-11-17 03:33:16,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-17 03:33:16,165 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-17 03:33:16,165 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 347 flow [2024-11-17 03:33:16,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.76923076923077) internal successors, (985), 13 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:16,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:16,167 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:16,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:16,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:16,367 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:16,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash -399560201, now seen corresponding path program 1 times [2024-11-17 03:33:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:16,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453746849] [2024-11-17 03:33:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:16,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453746849] [2024-11-17 03:33:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453746849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:16,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44813591] [2024-11-17 03:33:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:16,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:16,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:16,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 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) [2024-11-17 03:33:16,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:16,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:16,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:16,970 INFO L124 PetriNetUnfolderBase]: 2265/5019 cut-off events. [2024-11-17 03:33:16,971 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-17 03:33:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 5019 events. 2265/5019 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40747 event pairs, 1414 based on Foata normal form. 1/3871 useless extension candidates. Maximal degree in co-relation 8096. Up to 3030 conditions per place. [2024-11-17 03:33:17,007 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 58 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-11-17 03:33:17,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 131 transitions, 467 flow [2024-11-17 03:33:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-17 03:33:17,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-17 03:33:17,009 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 347 flow. Second operand 4 states and 366 transitions. [2024-11-17 03:33:17,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 131 transitions, 467 flow [2024-11-17 03:33:17,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 131 transitions, 442 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:17,014 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 333 flow [2024-11-17 03:33:17,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-11-17 03:33:17,016 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2024-11-17 03:33:17,017 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 333 flow [2024-11-17 03:33:17,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 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) [2024-11-17 03:33:17,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:17,018 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:17,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:33:17,018 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:17,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1351085577, now seen corresponding path program 1 times [2024-11-17 03:33:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214428948] [2024-11-17 03:33:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:17,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214428948] [2024-11-17 03:33:17,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214428948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:17,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:17,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:17,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311976924] [2024-11-17 03:33:17,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:17,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:17,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:17,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:17,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:17,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:17,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:17,901 INFO L124 PetriNetUnfolderBase]: 2265/5022 cut-off events. [2024-11-17 03:33:17,901 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-17 03:33:17,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 5022 events. 2265/5022 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40753 event pairs, 1414 based on Foata normal form. 0/3871 useless extension candidates. Maximal degree in co-relation 8097. Up to 3033 conditions per place. [2024-11-17 03:33:17,940 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 61 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-17 03:33:17,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 469 flow [2024-11-17 03:33:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2024-11-17 03:33:17,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-11-17 03:33:17,943 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 333 flow. Second operand 4 states and 356 transitions. [2024-11-17 03:33:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 469 flow [2024-11-17 03:33:17,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:17,946 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 346 flow [2024-11-17 03:33:17,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-17 03:33:17,947 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-17 03:33:17,947 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 346 flow [2024-11-17 03:33:17,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:17,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:17,947 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:17,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:33:17,948 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:17,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2050733474, now seen corresponding path program 1 times [2024-11-17 03:33:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228072126] [2024-11-17 03:33:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:18,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228072126] [2024-11-17 03:33:18,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228072126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649446914] [2024-11-17 03:33:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:18,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:18,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:33:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:18,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:18,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:18,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:33:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:18,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649446914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:18,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:33:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524781739] [2024-11-17 03:33:18,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:18,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:33:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:33:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:19,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:19,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 346 flow. Second operand has 13 states, 13 states have (on average 76.38461538461539) internal successors, (993), 13 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:19,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:19,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:19,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:20,610 INFO L124 PetriNetUnfolderBase]: 2266/5026 cut-off events. [2024-11-17 03:33:20,610 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-17 03:33:20,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8160 conditions, 5026 events. 2266/5026 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40815 event pairs, 1414 based on Foata normal form. 0/3877 useless extension candidates. Maximal degree in co-relation 8110. Up to 3020 conditions per place. [2024-11-17 03:33:20,657 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 51 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-17 03:33:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 500 flow [2024-11-17 03:33:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 807 transitions. [2024-11-17 03:33:20,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847826086956521 [2024-11-17 03:33:20,660 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 346 flow. Second operand 10 states and 807 transitions. [2024-11-17 03:33:20,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 500 flow [2024-11-17 03:33:20,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:20,664 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 385 flow [2024-11-17 03:33:20,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=385, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-11-17 03:33:20,667 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-17 03:33:20,667 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 385 flow [2024-11-17 03:33:20,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.38461538461539) internal successors, (993), 13 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:20,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:20,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:20,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:33:20,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:20,869 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:20,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696489, now seen corresponding path program 1 times [2024-11-17 03:33:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89322110] [2024-11-17 03:33:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:21,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89322110] [2024-11-17 03:33:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89322110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:21,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664721131] [2024-11-17 03:33:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:21,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:21,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:21,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:21,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:33:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:21,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:21,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:21,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:21,354 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664721131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:21,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-17 03:33:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872208355] [2024-11-17 03:33:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:21,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:33:21,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:21,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:21,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:21,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:21,865 INFO L124 PetriNetUnfolderBase]: 2267/5032 cut-off events. [2024-11-17 03:33:21,865 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-17 03:33:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 5032 events. 2267/5032 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40796 event pairs, 1414 based on Foata normal form. 0/3883 useless extension candidates. Maximal degree in co-relation 8130. Up to 3038 conditions per place. [2024-11-17 03:33:21,910 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 66 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2024-11-17 03:33:21,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 138 transitions, 533 flow [2024-11-17 03:33:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-11-17 03:33:21,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612318840579711 [2024-11-17 03:33:21,917 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 385 flow. Second operand 4 states and 365 transitions. [2024-11-17 03:33:21,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 138 transitions, 533 flow [2024-11-17 03:33:21,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 515 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:21,921 INFO L231 Difference]: Finished difference. Result has 136 places, 137 transitions, 391 flow [2024-11-17 03:33:21,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=136, PETRI_TRANSITIONS=137} [2024-11-17 03:33:21,922 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-17 03:33:21,923 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 137 transitions, 391 flow [2024-11-17 03:33:21,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:21,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:21,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:21,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:33:22,124 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 [2024-11-17 03:33:22,124 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:22,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696490, now seen corresponding path program 1 times [2024-11-17 03:33:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:22,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373245179] [2024-11-17 03:33:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373245179] [2024-11-17 03:33:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373245179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:22,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:22,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474622478] [2024-11-17 03:33:22,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:22,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:22,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:22,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 137 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:22,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:22,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:22,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:22,641 INFO L124 PetriNetUnfolderBase]: 2267/5028 cut-off events. [2024-11-17 03:33:22,642 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-17 03:33:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8177 conditions, 5028 events. 2267/5028 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 40778 event pairs, 1414 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 8123. Up to 3026 conditions per place. [2024-11-17 03:33:22,680 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 64 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2024-11-17 03:33:22,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 134 transitions, 519 flow [2024-11-17 03:33:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2024-11-17 03:33:22,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2024-11-17 03:33:22,682 INFO L175 Difference]: Start difference. First operand has 136 places, 137 transitions, 391 flow. Second operand 3 states and 284 transitions. [2024-11-17 03:33:22,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 134 transitions, 519 flow [2024-11-17 03:33:22,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 134 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:22,685 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 385 flow [2024-11-17 03:33:22,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-17 03:33:22,686 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 7 predicate places. [2024-11-17 03:33:22,687 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 385 flow [2024-11-17 03:33:22,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:22,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:22,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:22,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:33:22,688 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:22,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -765470395, now seen corresponding path program 1 times [2024-11-17 03:33:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212323388] [2024-11-17 03:33:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212323388] [2024-11-17 03:33:22,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212323388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633044326] [2024-11-17 03:33:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:22,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:22,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:33:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:22,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633044326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:23,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:23,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:33:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031031956] [2024-11-17 03:33:23,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:23,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:23,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:23,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 385 flow. Second operand has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:23,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:23,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:24,159 INFO L124 PetriNetUnfolderBase]: 4462/9831 cut-off events. [2024-11-17 03:33:24,159 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-17 03:33:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16019 conditions, 9831 events. 4462/9831 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 89388 event pairs, 2808 based on Foata normal form. 0/7672 useless extension candidates. Maximal degree in co-relation 8125. Up to 3019 conditions per place. [2024-11-17 03:33:24,225 INFO L140 encePairwiseOnDemand]: 119/138 looper letters, 89 selfloop transitions, 48 changer transitions 0/198 dead transitions. [2024-11-17 03:33:24,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 849 flow [2024-11-17 03:33:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1080 transitions. [2024-11-17 03:33:24,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020066889632107 [2024-11-17 03:33:24,228 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 385 flow. Second operand 13 states and 1080 transitions. [2024-11-17 03:33:24,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 849 flow [2024-11-17 03:33:24,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:24,232 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 645 flow [2024-11-17 03:33:24,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=645, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-11-17 03:33:24,233 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 22 predicate places. [2024-11-17 03:33:24,233 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 645 flow [2024-11-17 03:33:24,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:24,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:24,234 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:24,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:24,434 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,SelfDestructingSolverStorable10 [2024-11-17 03:33:24,435 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:24,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -767617289, now seen corresponding path program 1 times [2024-11-17 03:33:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:24,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817693637] [2024-11-17 03:33:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:24,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:24,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817693637] [2024-11-17 03:33:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817693637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454741463] [2024-11-17 03:33:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:24,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:24,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:25,434 INFO L124 PetriNetUnfolderBase]: 4528/10035 cut-off events. [2024-11-17 03:33:25,434 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-11-17 03:33:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16369 conditions, 10035 events. 4528/10035 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 91694 event pairs, 2828 based on Foata normal form. 2/7745 useless extension candidates. Maximal degree in co-relation 8154. Up to 6063 conditions per place. [2024-11-17 03:33:25,484 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 86 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2024-11-17 03:33:25,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 816 flow [2024-11-17 03:33:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-17 03:33:25,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-17 03:33:25,486 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 645 flow. Second operand 4 states and 364 transitions. [2024-11-17 03:33:25,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 816 flow [2024-11-17 03:33:25,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 158 transitions, 808 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:25,491 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 640 flow [2024-11-17 03:33:25,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=146, 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=4, PETRI_FLOW=640, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2024-11-17 03:33:25,491 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 24 predicate places. [2024-11-17 03:33:25,492 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 640 flow [2024-11-17 03:33:25,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:25,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:25,492 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:25,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:33:25,492 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:25,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1625088453, now seen corresponding path program 2 times [2024-11-17 03:33:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:25,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945333687] [2024-11-17 03:33:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:25,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:25,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945333687] [2024-11-17 03:33:25,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945333687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:25,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654205718] [2024-11-17 03:33:25,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:25,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:25,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:25,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:33:25,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:25,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:25,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:33:25,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:26,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:33:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654205718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:26,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:26,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-17 03:33:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157732633] [2024-11-17 03:33:26,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:26,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:33:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:33:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:33:27,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:27,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 640 flow. Second operand has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:27,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:27,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:27,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:30,104 INFO L124 PetriNetUnfolderBase]: 8925/19679 cut-off events. [2024-11-17 03:33:30,104 INFO L125 PetriNetUnfolderBase]: For 492/492 co-relation queries the response was YES. [2024-11-17 03:33:30,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32263 conditions, 19679 events. 8925/19679 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 190166 event pairs, 5616 based on Foata normal form. 1/15364 useless extension candidates. Maximal degree in co-relation 8240. Up to 6057 conditions per place. [2024-11-17 03:33:30,240 INFO L140 encePairwiseOnDemand]: 121/138 looper letters, 183 selfloop transitions, 76 changer transitions 0/317 dead transitions. [2024-11-17 03:33:30,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 317 transitions, 1875 flow [2024-11-17 03:33:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:33:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:33:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1700 transitions. [2024-11-17 03:33:30,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5866114561766735 [2024-11-17 03:33:30,246 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 640 flow. Second operand 21 states and 1700 transitions. [2024-11-17 03:33:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 317 transitions, 1875 flow [2024-11-17 03:33:30,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 317 transitions, 1849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:30,254 INFO L231 Difference]: Finished difference. Result has 173 places, 210 transitions, 1260 flow [2024-11-17 03:33:30,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1260, PETRI_PLACES=173, PETRI_TRANSITIONS=210} [2024-11-17 03:33:30,255 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 47 predicate places. [2024-11-17 03:33:30,255 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 210 transitions, 1260 flow [2024-11-17 03:33:30,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:30,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:30,256 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:30,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:33:30,457 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 [2024-11-17 03:33:30,458 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:30,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2146904713, now seen corresponding path program 1 times [2024-11-17 03:33:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:30,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813442108] [2024-11-17 03:33:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813442108] [2024-11-17 03:33:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813442108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349060990] [2024-11-17 03:33:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:30,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:30,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:33:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:30,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:30,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:31,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:31,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:31,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349060990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:31,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:31,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:33:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058017904] [2024-11-17 03:33:31,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:31,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:33:31,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:33:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:33:31,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:31,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 210 transitions, 1260 flow. Second operand has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:31,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:31,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:31,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:35,602 INFO L124 PetriNetUnfolderBase]: 17843/39315 cut-off events. [2024-11-17 03:33:35,602 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-11-17 03:33:35,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64518 conditions, 39315 events. 17843/39315 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 422038 event pairs, 11232 based on Foata normal form. 0/30691 useless extension candidates. Maximal degree in co-relation 48530. Up to 12098 conditions per place. [2024-11-17 03:33:35,906 INFO L140 encePairwiseOnDemand]: 127/138 looper letters, 195 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-11-17 03:33:35,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 313 transitions, 2378 flow [2024-11-17 03:33:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 858 transitions. [2024-11-17 03:33:35,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-11-17 03:33:35,909 INFO L175 Difference]: Start difference. First operand has 173 places, 210 transitions, 1260 flow. Second operand 10 states and 858 transitions. [2024-11-17 03:33:35,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 313 transitions, 2378 flow [2024-11-17 03:33:35,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 313 transitions, 2326 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:35,921 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 1736 flow [2024-11-17 03:33:35,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1736, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-11-17 03:33:35,922 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 56 predicate places. [2024-11-17 03:33:35,922 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 1736 flow [2024-11-17 03:33:35,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:35,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:35,923 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:35,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:36,127 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 [2024-11-17 03:33:36,128 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:36,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -137495519, now seen corresponding path program 3 times [2024-11-17 03:33:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111442869] [2024-11-17 03:33:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:36,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:36,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111442869] [2024-11-17 03:33:36,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111442869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:36,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197782794] [2024-11-17 03:33:36,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:33:36,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:36,300 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:36,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:33:36,408 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:33:36,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:36,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:36,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:36,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:36,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-17 03:33:36,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:33:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:36,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:36,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197782794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:36,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:36,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-17 03:33:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112539040] [2024-11-17 03:33:36,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:36,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:33:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:33:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:33:38,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:38,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 1736 flow. Second operand has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:38,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:38,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:38,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:42,783 INFO L124 PetriNetUnfolderBase]: 17837/39283 cut-off events. [2024-11-17 03:33:42,783 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2024-11-17 03:33:42,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 39283 events. 17837/39283 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 421962 event pairs, 11232 based on Foata normal form. 6/30665 useless extension candidates. Maximal degree in co-relation 48980. Up to 12052 conditions per place. [2024-11-17 03:33:43,105 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 145 selfloop transitions, 92 changer transitions 0/295 dead transitions. [2024-11-17 03:33:43,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 295 transitions, 2405 flow [2024-11-17 03:33:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:33:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:33:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1832 transitions. [2024-11-17 03:33:43,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-11-17 03:33:43,110 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 1736 flow. Second operand 24 states and 1832 transitions. [2024-11-17 03:33:43,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 295 transitions, 2405 flow [2024-11-17 03:33:43,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 295 transitions, 2390 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:43,123 INFO L231 Difference]: Finished difference. Result has 202 places, 247 transitions, 1928 flow [2024-11-17 03:33:43,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1928, PETRI_PLACES=202, PETRI_TRANSITIONS=247} [2024-11-17 03:33:43,124 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 76 predicate places. [2024-11-17 03:33:43,124 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 247 transitions, 1928 flow [2024-11-17 03:33:43,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:43,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:43,125 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:43,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:33:43,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:33:43,326 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:43,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2081456224, now seen corresponding path program 1 times [2024-11-17 03:33:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:43,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330873252] [2024-11-17 03:33:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:43,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330873252] [2024-11-17 03:33:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330873252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918226221] [2024-11-17 03:33:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:43,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:43,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:33:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:43,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:43,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:43,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:43,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918226221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:43,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:33:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259895654] [2024-11-17 03:33:43,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:43,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:43,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 247 transitions, 1928 flow. Second operand has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:43,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:43,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:48,321 INFO L124 PetriNetUnfolderBase]: 17833/39271 cut-off events. [2024-11-17 03:33:48,322 INFO L125 PetriNetUnfolderBase]: For 1555/1555 co-relation queries the response was YES. [2024-11-17 03:33:48,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64692 conditions, 39271 events. 17833/39271 cut-off events. For 1555/1555 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 421510 event pairs, 11232 based on Foata normal form. 4/30667 useless extension candidates. Maximal degree in co-relation 33500. Up to 12068 conditions per place. [2024-11-17 03:33:48,648 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 141 selfloop transitions, 124 changer transitions 0/325 dead transitions. [2024-11-17 03:33:48,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 325 transitions, 2942 flow [2024-11-17 03:33:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1076 transitions. [2024-11-17 03:33:48,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5997770345596433 [2024-11-17 03:33:48,650 INFO L175 Difference]: Start difference. First operand has 202 places, 247 transitions, 1928 flow. Second operand 13 states and 1076 transitions. [2024-11-17 03:33:48,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 325 transitions, 2942 flow [2024-11-17 03:33:48,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 325 transitions, 2811 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-11-17 03:33:48,666 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 2376 flow [2024-11-17 03:33:48,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2376, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-11-17 03:33:48,667 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 78 predicate places. [2024-11-17 03:33:48,667 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 2376 flow [2024-11-17 03:33:48,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:48,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:48,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:48,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:48,871 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,SelfDestructingSolverStorable15 [2024-11-17 03:33:48,872 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:48,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2081703690, now seen corresponding path program 1 times [2024-11-17 03:33:48,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:48,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9445947] [2024-11-17 03:33:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:48,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:48,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9445947] [2024-11-17 03:33:48,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9445947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:48,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:48,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:48,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904946533] [2024-11-17 03:33:48,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:48,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:48,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:48,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:48,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 2376 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:48,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:48,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:52,884 INFO L124 PetriNetUnfolderBase]: 18097/40087 cut-off events. [2024-11-17 03:33:52,885 INFO L125 PetriNetUnfolderBase]: For 1788/1788 co-relation queries the response was YES. [2024-11-17 03:33:53,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65848 conditions, 40087 events. 18097/40087 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 433051 event pairs, 11312 based on Foata normal form. 8/30927 useless extension candidates. Maximal degree in co-relation 49648. Up to 24228 conditions per place. [2024-11-17 03:33:53,388 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 178 selfloop transitions, 11 changer transitions 0/261 dead transitions. [2024-11-17 03:33:53,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2653 flow [2024-11-17 03:33:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-17 03:33:53,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-17 03:33:53,389 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 2376 flow. Second operand 4 states and 364 transitions. [2024-11-17 03:33:53,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2653 flow [2024-11-17 03:33:53,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 261 transitions, 2451 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-11-17 03:33:53,403 INFO L231 Difference]: Finished difference. Result has 198 places, 260 transitions, 2107 flow [2024-11-17 03:33:53,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2107, PETRI_PLACES=198, PETRI_TRANSITIONS=260} [2024-11-17 03:33:53,404 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 72 predicate places. [2024-11-17 03:33:53,404 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 260 transitions, 2107 flow [2024-11-17 03:33:53,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:53,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:53,405 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:53,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:33:53,405 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:53,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 383869024, now seen corresponding path program 2 times [2024-11-17 03:33:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642818233] [2024-11-17 03:33:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:53,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642818233] [2024-11-17 03:33:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642818233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805371391] [2024-11-17 03:33:53,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:53,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:53,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:53,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:33:53,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:53,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:53,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:33:53,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:54,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-17 03:33:54,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-17 03:33:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:54,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:54,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805371391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:54,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:54,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-17 03:33:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658519124] [2024-11-17 03:33:54,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:54,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:33:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:33:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:33:55,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:55,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 260 transitions, 2107 flow. Second operand has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:55,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:55,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:02,288 INFO L124 PetriNetUnfolderBase]: 26600/58475 cut-off events. [2024-11-17 03:34:02,288 INFO L125 PetriNetUnfolderBase]: For 2233/2233 co-relation queries the response was YES. [2024-11-17 03:34:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96359 conditions, 58475 events. 26600/58475 cut-off events. For 2233/2233 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 654102 event pairs, 16808 based on Foata normal form. 8/45831 useless extension candidates. Maximal degree in co-relation 72623. Up to 12116 conditions per place. [2024-11-17 03:34:02,773 INFO L140 encePairwiseOnDemand]: 123/138 looper letters, 295 selfloop transitions, 86 changer transitions 0/439 dead transitions. [2024-11-17 03:34:02,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 439 transitions, 4127 flow [2024-11-17 03:34:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 03:34:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-17 03:34:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1313 transitions. [2024-11-17 03:34:02,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5946557971014492 [2024-11-17 03:34:02,776 INFO L175 Difference]: Start difference. First operand has 198 places, 260 transitions, 2107 flow. Second operand 16 states and 1313 transitions. [2024-11-17 03:34:02,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 439 transitions, 4127 flow [2024-11-17 03:34:02,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 439 transitions, 4095 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:02,793 INFO L231 Difference]: Finished difference. Result has 216 places, 315 transitions, 3119 flow [2024-11-17 03:34:02,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3119, PETRI_PLACES=216, PETRI_TRANSITIONS=315} [2024-11-17 03:34:02,794 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 90 predicate places. [2024-11-17 03:34:02,794 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 315 transitions, 3119 flow [2024-11-17 03:34:02,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:02,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:02,795 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:02,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:34:02,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:34:02,995 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:34:02,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2074047021, now seen corresponding path program 1 times [2024-11-17 03:34:02,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:02,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41791733] [2024-11-17 03:34:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:02,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:34:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41791733] [2024-11-17 03:34:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41791733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042856168] [2024-11-17 03:34:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:03,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:03,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:34:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:03,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:34:03,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:03,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:03,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-17 03:34:03,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-17 03:34:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:34:03,692 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:34:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042856168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:34:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-11-17 03:34:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729980862] [2024-11-17 03:34:03,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:03,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:34:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:34:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:34:03,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:34:03,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 315 transitions, 3119 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:03,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:03,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:34:03,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:10,474 INFO L124 PetriNetUnfolderBase]: 27156/60199 cut-off events. [2024-11-17 03:34:10,475 INFO L125 PetriNetUnfolderBase]: For 2805/2805 co-relation queries the response was YES. [2024-11-17 03:34:10,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99039 conditions, 60199 events. 27156/60199 cut-off events. For 2805/2805 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 679316 event pairs, 16968 based on Foata normal form. 0/46427 useless extension candidates. Maximal degree in co-relation 74665. Up to 36369 conditions per place. [2024-11-17 03:34:11,075 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 217 selfloop transitions, 14 changer transitions 0/323 dead transitions. [2024-11-17 03:34:11,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 323 transitions, 3642 flow [2024-11-17 03:34:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:34:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:34:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-17 03:34:11,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-17 03:34:11,076 INFO L175 Difference]: Start difference. First operand has 216 places, 315 transitions, 3119 flow. Second operand 4 states and 364 transitions. [2024-11-17 03:34:11,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 323 transitions, 3642 flow [2024-11-17 03:34:11,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 323 transitions, 3583 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-17 03:34:11,091 INFO L231 Difference]: Finished difference. Result has 215 places, 322 transitions, 3176 flow [2024-11-17 03:34:11,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3176, PETRI_PLACES=215, PETRI_TRANSITIONS=322} [2024-11-17 03:34:11,092 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 89 predicate places. [2024-11-17 03:34:11,092 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 322 transitions, 3176 flow [2024-11-17 03:34:11,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:11,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:11,093 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:11,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-17 03:34:11,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:11,294 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:34:11,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1654659287, now seen corresponding path program 3 times [2024-11-17 03:34:11,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:11,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92512598] [2024-11-17 03:34:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:34:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:11,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92512598] [2024-11-17 03:34:11,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92512598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:11,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124950146] [2024-11-17 03:34:11,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:34:11,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:11,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:11,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:34:11,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:34:11,655 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:34:11,655 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:34:11,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:34:11,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:11,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:34:11,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-17 03:34:11,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-17 03:34:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-17 03:34:11,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:34:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-17 03:34:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124950146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:34:12,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:34:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2024-11-17 03:34:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800261976] [2024-11-17 03:34:12,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:34:12,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:34:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:34:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:34:13,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:34:13,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 322 transitions, 3176 flow. Second operand has 21 states, 21 states have (on average 74.0) internal successors, (1554), 21 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:34:13,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:13,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:34:13,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand