./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:38:07,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:38:07,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:38:07,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:38:07,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:38:07,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:38:07,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:38:07,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:38:07,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:38:07,746 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:38:07,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:38:07,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:38:07,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:38:07,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:38:07,748 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:38:07,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:38:07,748 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:38:07,749 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:38:07,749 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:38:07,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:38:07,749 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:38:07,750 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:38:07,750 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:38:07,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:38:07,751 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:38:07,751 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:38:07,751 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:38:07,751 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:38:07,752 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:38:07,752 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:38:07,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:38:07,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:38:07,753 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:38:07,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:07,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:38:07,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:38:07,754 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:38:07,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:38:07,754 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:38:07,755 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:38:07,755 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:38:07,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:38:07,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-17 03:38:07,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:38:07,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:38:07,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:38:07,993 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:38:07,994 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:38:07,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-17 03:38:09,307 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:38:09,481 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:38:09,483 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-17 03:38:09,492 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc8a65a0/e6ea1653e3c648db8baec2045fe62803/FLAG629d8f0c4 [2024-11-17 03:38:09,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc8a65a0/e6ea1653e3c648db8baec2045fe62803 [2024-11-17 03:38:09,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:38:09,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:38:09,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:09,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:38:09,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:38:09,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0d3ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09, skipping insertion in model container [2024-11-17 03:38:09,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,539 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:38:09,719 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 03:38:09,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:09,738 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:38:09,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:09,770 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:38:09,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09 WrapperNode [2024-11-17 03:38:09,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:09,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:09,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:38:09,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:38:09,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,829 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 180 [2024-11-17 03:38:09,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:09,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:38:09,833 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:38:09,833 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:38:09,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,873 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:38:09,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,882 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:38:09,898 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:38:09,898 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:38:09,898 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:38:09,898 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (1/1) ... [2024-11-17 03:38:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:09,932 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 03:38:09,937 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 03:38:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:38:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:38:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:38:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:38:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:38:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:38:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:38:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:38:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:38:09,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:38:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:38:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:38:09,976 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 03:38:10,083 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:38:10,085 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:38:10,319 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:38:10,320 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:38:10,480 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:38:10,481 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:38:10,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:10 BoogieIcfgContainer [2024-11-17 03:38:10,481 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:38:10,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:38:10,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:38:10,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:38:10,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:09" (1/3) ... [2024-11-17 03:38:10,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432b504f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:10, skipping insertion in model container [2024-11-17 03:38:10,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:09" (2/3) ... [2024-11-17 03:38:10,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432b504f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:10, skipping insertion in model container [2024-11-17 03:38:10,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:10" (3/3) ... [2024-11-17 03:38:10,488 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-17 03:38:10,501 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:38:10,501 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-17 03:38:10,502 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:38:10,549 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:38:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 56 transitions, 133 flow [2024-11-17 03:38:10,608 INFO L124 PetriNetUnfolderBase]: 8/53 cut-off events. [2024-11-17 03:38:10,608 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:38:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 53 events. 8/53 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-11-17 03:38:10,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 56 transitions, 133 flow [2024-11-17 03:38:10,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 52 transitions, 122 flow [2024-11-17 03:38:10,632 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:38:10,639 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;@5d3ac2c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:38:10,640 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-17 03:38:10,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:38:10,643 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:38:10,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:38:10,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:10,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:10,644 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:10,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 16962903, now seen corresponding path program 1 times [2024-11-17 03:38:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149797532] [2024-11-17 03:38:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:10,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:10,943 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 03:38:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149797532] [2024-11-17 03:38:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149797532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:10,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:38:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125893647] [2024-11-17 03:38:10,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:10,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:38:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:38:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:38:10,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-11-17 03:38:10,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 03:38:10,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:10,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-11-17 03:38:10,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:11,247 INFO L124 PetriNetUnfolderBase]: 1316/2138 cut-off events. [2024-11-17 03:38:11,247 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-11-17 03:38:11,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 2138 events. 1316/2138 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 13318 event pairs, 1060 based on Foata normal form. 257/1748 useless extension candidates. Maximal degree in co-relation 3843. Up to 1877 conditions per place. [2024-11-17 03:38:11,267 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-17 03:38:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 172 flow [2024-11-17 03:38:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:38:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:38:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-17 03:38:11,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-11-17 03:38:11,279 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 122 flow. Second operand 3 states and 89 transitions. [2024-11-17 03:38:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 172 flow [2024-11-17 03:38:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:38:11,287 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 100 flow [2024-11-17 03:38:11,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-17 03:38:11,293 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-17 03:38:11,294 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 100 flow [2024-11-17 03:38:11,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 03:38:11,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:11,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:11,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:38:11,295 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:11,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 16962904, now seen corresponding path program 1 times [2024-11-17 03:38:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:11,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889458851] [2024-11-17 03:38:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:11,591 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 03:38:11,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:11,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889458851] [2024-11-17 03:38:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889458851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:11,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938444208] [2024-11-17 03:38:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:11,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:11,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-11-17 03:38:11,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:38:11,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:11,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-11-17 03:38:11,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:11,854 INFO L124 PetriNetUnfolderBase]: 1317/2143 cut-off events. [2024-11-17 03:38:11,854 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-17 03:38:11,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 2143 events. 1317/2143 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 13355 event pairs, 1060 based on Foata normal form. 0/1495 useless extension candidates. Maximal degree in co-relation 4049. Up to 1882 conditions per place. [2024-11-17 03:38:11,868 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-11-17 03:38:11,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 180 flow [2024-11-17 03:38:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-17 03:38:11,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-17 03:38:11,872 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 100 flow. Second operand 4 states and 105 transitions. [2024-11-17 03:38:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 180 flow [2024-11-17 03:38:11,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:11,874 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 123 flow [2024-11-17 03:38:11,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-17 03:38:11,897 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-17 03:38:11,897 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 123 flow [2024-11-17 03:38:11,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:38:11,897 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:11,897 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:38:11,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:38:11,898 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:11,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1463719801, now seen corresponding path program 1 times [2024-11-17 03:38:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:11,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35742632] [2024-11-17 03:38:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:11,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:12,210 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 03:38:12,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:12,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35742632] [2024-11-17 03:38:12,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35742632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:12,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359139462] [2024-11-17 03:38:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:12,213 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 03:38:12,215 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 03:38:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:12,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:38:12,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:12,347 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 03:38:12,508 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 03:38:12,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:12,621 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 03:38:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359139462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:12,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:12,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:38:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965419863] [2024-11-17 03:38:12,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:12,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:12,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:12,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-17 03:38:12,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 123 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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 03:38:12,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:12,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-17 03:38:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:12,970 INFO L124 PetriNetUnfolderBase]: 1317/2142 cut-off events. [2024-11-17 03:38:12,970 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-17 03:38:12,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4084 conditions, 2142 events. 1317/2142 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 13346 event pairs, 1060 based on Foata normal form. 0/1495 useless extension candidates. Maximal degree in co-relation 4059. Up to 1878 conditions per place. [2024-11-17 03:38:12,982 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 30 selfloop transitions, 7 changer transitions 0/48 dead transitions. [2024-11-17 03:38:12,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 195 flow [2024-11-17 03:38:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:38:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:38:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-11-17 03:38:12,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-11-17 03:38:12,984 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 123 flow. Second operand 6 states and 134 transitions. [2024-11-17 03:38:12,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 195 flow [2024-11-17 03:38:12,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:12,986 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 130 flow [2024-11-17 03:38:12,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-17 03:38:12,987 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-17 03:38:12,987 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 130 flow [2024-11-17 03:38:12,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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 03:38:12,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:12,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:13,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:38:13,188 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 03:38:13,189 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:13,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:13,189 INFO L85 PathProgramCache]: Analyzing trace with hash 485634544, now seen corresponding path program 1 times [2024-11-17 03:38:13,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:13,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240665918] [2024-11-17 03:38:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:13,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:13,255 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 03:38:13,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240665918] [2024-11-17 03:38:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240665918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:13,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:13,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103798327] [2024-11-17 03:38:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:13,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:13,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:13,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-11-17 03:38:13,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 03:38:13,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-11-17 03:38:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:13,433 INFO L124 PetriNetUnfolderBase]: 793/1328 cut-off events. [2024-11-17 03:38:13,434 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-17 03:38:13,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1328 events. 793/1328 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7585 event pairs, 608 based on Foata normal form. 0/1040 useless extension candidates. Maximal degree in co-relation 2491. Up to 1135 conditions per place. [2024-11-17 03:38:13,441 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 29 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2024-11-17 03:38:13,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 188 flow [2024-11-17 03:38:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-17 03:38:13,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-17 03:38:13,445 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 130 flow. Second operand 4 states and 100 transitions. [2024-11-17 03:38:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 188 flow [2024-11-17 03:38:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 165 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-17 03:38:13,446 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 107 flow [2024-11-17 03:38:13,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-11-17 03:38:13,447 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-17 03:38:13,448 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 107 flow [2024-11-17 03:38:13,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 03:38:13,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:13,449 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:13,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:38:13,450 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:13,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 485634545, now seen corresponding path program 1 times [2024-11-17 03:38:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999666019] [2024-11-17 03:38:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:13,517 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 03:38:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:13,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999666019] [2024-11-17 03:38:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999666019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:13,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:13,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:38:13,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184005885] [2024-11-17 03:38:13,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:13,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:13,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-17 03:38:13,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:13,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:13,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-17 03:38:13,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:13,744 INFO L124 PetriNetUnfolderBase]: 1374/2410 cut-off events. [2024-11-17 03:38:13,745 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-17 03:38:13,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 2410 events. 1374/2410 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15647 event pairs, 966 based on Foata normal form. 62/2047 useless extension candidates. Maximal degree in co-relation 2928. Up to 1348 conditions per place. [2024-11-17 03:38:13,755 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 66 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2024-11-17 03:38:13,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 335 flow [2024-11-17 03:38:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:38:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:38:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-17 03:38:13,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-11-17 03:38:13,757 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 107 flow. Second operand 6 states and 169 transitions. [2024-11-17 03:38:13,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 335 flow [2024-11-17 03:38:13,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 82 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:13,758 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 137 flow [2024-11-17 03:38:13,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-17 03:38:13,759 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-17 03:38:13,759 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 137 flow [2024-11-17 03:38:13,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:13,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:13,760 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:13,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:38:13,760 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:13,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1409842631, now seen corresponding path program 1 times [2024-11-17 03:38:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149157920] [2024-11-17 03:38:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:13,824 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 03:38:13,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:13,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149157920] [2024-11-17 03:38:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149157920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:13,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:38:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818415841] [2024-11-17 03:38:13,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:13,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:38:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:38:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:38:13,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-17 03:38:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 03:38:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-17 03:38:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:14,052 INFO L124 PetriNetUnfolderBase]: 1171/1989 cut-off events. [2024-11-17 03:38:14,052 INFO L125 PetriNetUnfolderBase]: For 417/489 co-relation queries the response was YES. [2024-11-17 03:38:14,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 1989 events. 1171/1989 cut-off events. For 417/489 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12143 event pairs, 864 based on Foata normal form. 41/1687 useless extension candidates. Maximal degree in co-relation 3047. Up to 1359 conditions per place. [2024-11-17 03:38:14,061 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 59 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2024-11-17 03:38:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 339 flow [2024-11-17 03:38:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:38:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:38:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-17 03:38:14,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-17 03:38:14,063 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 137 flow. Second operand 6 states and 162 transitions. [2024-11-17 03:38:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 339 flow [2024-11-17 03:38:14,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:14,065 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 162 flow [2024-11-17 03:38:14,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-11-17 03:38:14,066 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-17 03:38:14,067 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 162 flow [2024-11-17 03:38:14,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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 03:38:14,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:14,067 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:14,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:38:14,067 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:14,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash -997506014, now seen corresponding path program 1 times [2024-11-17 03:38:14,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:14,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530612277] [2024-11-17 03:38:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:14,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:14,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:14,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530612277] [2024-11-17 03:38:14,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530612277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:14,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849206988] [2024-11-17 03:38:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:14,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:14,189 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 03:38:14,192 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 03:38:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:14,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:14,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:14,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:14,353 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 22 treesize of output 18 [2024-11-17 03:38:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:14,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849206988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:14,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:14,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-17 03:38:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374729965] [2024-11-17 03:38:14,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:14,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:14,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-17 03:38:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 19.454545454545453) internal successors, (214), 11 states have internal predecessors, (214), 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 03:38:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-17 03:38:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:14,803 INFO L124 PetriNetUnfolderBase]: 1372/2351 cut-off events. [2024-11-17 03:38:14,803 INFO L125 PetriNetUnfolderBase]: For 853/996 co-relation queries the response was YES. [2024-11-17 03:38:14,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2351 events. 1372/2351 cut-off events. For 853/996 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14150 event pairs, 538 based on Foata normal form. 0/1999 useless extension candidates. Maximal degree in co-relation 4001. Up to 987 conditions per place. [2024-11-17 03:38:14,819 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 75 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2024-11-17 03:38:14,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 446 flow [2024-11-17 03:38:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-11-17 03:38:14,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5382653061224489 [2024-11-17 03:38:14,821 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 162 flow. Second operand 7 states and 211 transitions. [2024-11-17 03:38:14,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 446 flow [2024-11-17 03:38:14,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:14,826 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 196 flow [2024-11-17 03:38:14,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-11-17 03:38:14,827 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-17 03:38:14,827 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 196 flow [2024-11-17 03:38:14,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.454545454545453) internal successors, (214), 11 states have internal predecessors, (214), 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 03:38:14,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:14,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:14,842 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 03:38:15,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:38:15,032 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:15,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1392004754, now seen corresponding path program 1 times [2024-11-17 03:38:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906229247] [2024-11-17 03:38:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:15,144 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 03:38:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:15,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906229247] [2024-11-17 03:38:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906229247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:38:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056571207] [2024-11-17 03:38:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:15,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:38:15,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:38:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:38:15,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 56 [2024-11-17 03:38:15,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 03:38:15,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:15,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 56 [2024-11-17 03:38:15,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:15,462 INFO L124 PetriNetUnfolderBase]: 1703/2631 cut-off events. [2024-11-17 03:38:15,463 INFO L125 PetriNetUnfolderBase]: For 3019/3259 co-relation queries the response was YES. [2024-11-17 03:38:15,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 2631 events. 1703/2631 cut-off events. For 3019/3259 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 14975 event pairs, 1104 based on Foata normal form. 0/2308 useless extension candidates. Maximal degree in co-relation 6004. Up to 1891 conditions per place. [2024-11-17 03:38:15,481 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 71 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2024-11-17 03:38:15,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 486 flow [2024-11-17 03:38:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-11-17 03:38:15,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45663265306122447 [2024-11-17 03:38:15,482 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 196 flow. Second operand 7 states and 179 transitions. [2024-11-17 03:38:15,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 486 flow [2024-11-17 03:38:15,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 470 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:15,488 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 221 flow [2024-11-17 03:38:15,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-11-17 03:38:15,489 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-11-17 03:38:15,490 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 221 flow [2024-11-17 03:38:15,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 03:38:15,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:15,490 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:15,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:38:15,490 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:15,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2040907704, now seen corresponding path program 1 times [2024-11-17 03:38:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:15,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909984530] [2024-11-17 03:38:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:15,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909984530] [2024-11-17 03:38:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909984530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844144382] [2024-11-17 03:38:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:15,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:15,619 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 03:38:15,620 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 03:38:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:15,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:15,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:15,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:15,797 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 22 treesize of output 18 [2024-11-17 03:38:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844144382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:15,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:15,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-17 03:38:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817532518] [2024-11-17 03:38:15,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:15,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:15,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-17 03:38:15,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 221 flow. Second operand has 11 states, 11 states have (on average 19.818181818181817) internal successors, (218), 11 states have internal predecessors, (218), 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 03:38:15,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:15,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-17 03:38:15,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:16,230 INFO L124 PetriNetUnfolderBase]: 1811/3113 cut-off events. [2024-11-17 03:38:16,230 INFO L125 PetriNetUnfolderBase]: For 3087/3307 co-relation queries the response was YES. [2024-11-17 03:38:16,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8020 conditions, 3113 events. 1811/3113 cut-off events. For 3087/3307 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19612 event pairs, 796 based on Foata normal form. 0/2856 useless extension candidates. Maximal degree in co-relation 7189. Up to 1389 conditions per place. [2024-11-17 03:38:16,245 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 79 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2024-11-17 03:38:16,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 569 flow [2024-11-17 03:38:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-11-17 03:38:16,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-11-17 03:38:16,246 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 221 flow. Second operand 7 states and 206 transitions. [2024-11-17 03:38:16,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 569 flow [2024-11-17 03:38:16,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:16,254 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 257 flow [2024-11-17 03:38:16,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-11-17 03:38:16,254 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-11-17 03:38:16,255 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 257 flow [2024-11-17 03:38:16,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.818181818181817) internal successors, (218), 11 states have internal predecessors, (218), 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 03:38:16,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:16,255 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:16,268 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 03:38:16,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:16,460 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:16,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1211183486, now seen corresponding path program 1 times [2024-11-17 03:38:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082245765] [2024-11-17 03:38:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082245765] [2024-11-17 03:38:16,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082245765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94007118] [2024-11-17 03:38:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:16,546 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 03:38:16,550 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 03:38:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:16,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:16,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:16,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:16,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94007118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:16,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:16,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163647068] [2024-11-17 03:38:16,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:16,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:16,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:16,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 56 [2024-11-17 03:38:16,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 257 flow. Second operand has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 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 03:38:16,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:16,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 56 [2024-11-17 03:38:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:17,534 INFO L124 PetriNetUnfolderBase]: 4541/7252 cut-off events. [2024-11-17 03:38:17,534 INFO L125 PetriNetUnfolderBase]: For 8669/8884 co-relation queries the response was YES. [2024-11-17 03:38:17,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21025 conditions, 7252 events. 4541/7252 cut-off events. For 8669/8884 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 48083 event pairs, 2081 based on Foata normal form. 86/6834 useless extension candidates. Maximal degree in co-relation 16347. Up to 2941 conditions per place. [2024-11-17 03:38:17,675 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 144 selfloop transitions, 19 changer transitions 0/173 dead transitions. [2024-11-17 03:38:17,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 173 transitions, 1067 flow [2024-11-17 03:38:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:38:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:38:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 309 transitions. [2024-11-17 03:38:17,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2024-11-17 03:38:17,677 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 257 flow. Second operand 12 states and 309 transitions. [2024-11-17 03:38:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 173 transitions, 1067 flow [2024-11-17 03:38:17,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 173 transitions, 1040 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:17,684 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 370 flow [2024-11-17 03:38:17,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=370, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2024-11-17 03:38:17,685 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-11-17 03:38:17,685 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 370 flow [2024-11-17 03:38:17,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 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 03:38:17,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:17,685 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:17,705 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 03:38:17,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:17,886 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:17,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2039816125, now seen corresponding path program 1 times [2024-11-17 03:38:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318801910] [2024-11-17 03:38:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:18,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:18,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318801910] [2024-11-17 03:38:18,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318801910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:18,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390157980] [2024-11-17 03:38:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:18,049 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 03:38:18,050 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 03:38:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:18,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:38:18,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:18,274 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:38:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390157980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:18,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:38:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-17 03:38:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703388241] [2024-11-17 03:38:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:18,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:38:18,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:38:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:18,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 56 [2024-11-17 03:38:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 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 03:38:18,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:18,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 56 [2024-11-17 03:38:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:18,946 INFO L124 PetriNetUnfolderBase]: 3506/5630 cut-off events. [2024-11-17 03:38:18,946 INFO L125 PetriNetUnfolderBase]: For 13270/13774 co-relation queries the response was YES. [2024-11-17 03:38:18,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18440 conditions, 5630 events. 3506/5630 cut-off events. For 13270/13774 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 36171 event pairs, 999 based on Foata normal form. 0/5554 useless extension candidates. Maximal degree in co-relation 12792. Up to 1920 conditions per place. [2024-11-17 03:38:18,981 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 96 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-11-17 03:38:18,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 117 transitions, 901 flow [2024-11-17 03:38:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:38:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:38:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-11-17 03:38:18,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-17 03:38:18,982 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 370 flow. Second operand 6 states and 148 transitions. [2024-11-17 03:38:18,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 117 transitions, 901 flow [2024-11-17 03:38:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 870 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:18,994 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 373 flow [2024-11-17 03:38:18,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-11-17 03:38:18,995 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2024-11-17 03:38:18,995 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 373 flow [2024-11-17 03:38:18,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 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 03:38:18,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:18,996 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:19,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:38:19,199 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 03:38:19,200 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:19,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash 513322132, now seen corresponding path program 1 times [2024-11-17 03:38:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:19,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090390288] [2024-11-17 03:38:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:19,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090390288] [2024-11-17 03:38:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090390288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77437824] [2024-11-17 03:38:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:19,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:19,297 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 03:38:19,301 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 03:38:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:19,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:38:19,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:19,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:19,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77437824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:19,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:19,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-17 03:38:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025122291] [2024-11-17 03:38:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:19,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:38:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:38:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:38:19,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 56 [2024-11-17 03:38:19,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 373 flow. Second operand has 16 states, 16 states have (on average 17.1875) internal successors, (275), 16 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:19,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:19,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 56 [2024-11-17 03:38:19,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:20,405 INFO L124 PetriNetUnfolderBase]: 3353/5218 cut-off events. [2024-11-17 03:38:20,406 INFO L125 PetriNetUnfolderBase]: For 11090/11219 co-relation queries the response was YES. [2024-11-17 03:38:20,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17016 conditions, 5218 events. 3353/5218 cut-off events. For 11090/11219 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31596 event pairs, 1561 based on Foata normal form. 54/5142 useless extension candidates. Maximal degree in co-relation 12584. Up to 2460 conditions per place. [2024-11-17 03:38:20,442 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 122 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2024-11-17 03:38:20,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1097 flow [2024-11-17 03:38:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:38:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:38:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-11-17 03:38:20,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43898809523809523 [2024-11-17 03:38:20,444 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 373 flow. Second operand 12 states and 295 transitions. [2024-11-17 03:38:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1097 flow [2024-11-17 03:38:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 153 transitions, 1039 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:20,457 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 442 flow [2024-11-17 03:38:20,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=99, PETRI_TRANSITIONS=73} [2024-11-17 03:38:20,458 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-11-17 03:38:20,458 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 442 flow [2024-11-17 03:38:20,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.1875) internal successors, (275), 16 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:20,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:20,459 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:20,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:20,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:20,663 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:20,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1236891181, now seen corresponding path program 2 times [2024-11-17 03:38:20,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568106885] [2024-11-17 03:38:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:20,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568106885] [2024-11-17 03:38:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568106885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820116593] [2024-11-17 03:38:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:38:20,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:20,930 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 03:38:20,936 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 03:38:21,001 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:38:21,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:21,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:38:21,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:21,030 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 03:38:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:38:21,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:38:21,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820116593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:21,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:21,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-17 03:38:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559304352] [2024-11-17 03:38:21,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:21,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:38:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:38:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:38:21,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-17 03:38:21,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 442 flow. Second operand has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 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 03:38:21,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:21,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-17 03:38:21,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:23,268 INFO L124 PetriNetUnfolderBase]: 3732/5909 cut-off events. [2024-11-17 03:38:23,268 INFO L125 PetriNetUnfolderBase]: For 13032/13364 co-relation queries the response was YES. [2024-11-17 03:38:23,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19844 conditions, 5909 events. 3732/5909 cut-off events. For 13032/13364 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37263 event pairs, 522 based on Foata normal form. 72/5905 useless extension candidates. Maximal degree in co-relation 14966. Up to 1080 conditions per place. [2024-11-17 03:38:23,300 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 193 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-11-17 03:38:23,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 229 transitions, 1583 flow [2024-11-17 03:38:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 03:38:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-17 03:38:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 423 transitions. [2024-11-17 03:38:23,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-11-17 03:38:23,302 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 442 flow. Second operand 15 states and 423 transitions. [2024-11-17 03:38:23,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 229 transitions, 1583 flow [2024-11-17 03:38:23,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 229 transitions, 1531 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:23,320 INFO L231 Difference]: Finished difference. Result has 110 places, 76 transitions, 501 flow [2024-11-17 03:38:23,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=501, PETRI_PLACES=110, PETRI_TRANSITIONS=76} [2024-11-17 03:38:23,322 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-11-17 03:38:23,322 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 76 transitions, 501 flow [2024-11-17 03:38:23,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 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 03:38:23,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:23,322 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:23,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:38:23,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:23,527 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:23,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash -551386749, now seen corresponding path program 2 times [2024-11-17 03:38:23,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:23,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775010670] [2024-11-17 03:38:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:23,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775010670] [2024-11-17 03:38:23,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775010670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086212947] [2024-11-17 03:38:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:38:23,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:23,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:23,682 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 03:38:23,683 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 03:38:23,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:38:23,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:23,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:38:23,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:23,753 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 03:38:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:23,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086212947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:24,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:24,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-17 03:38:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956219255] [2024-11-17 03:38:24,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:24,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:38:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:38:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:38:24,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-11-17 03:38:24,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 76 transitions, 501 flow. Second operand has 20 states, 20 states have (on average 18.95) internal successors, (379), 20 states have internal predecessors, (379), 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 03:38:24,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:24,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-11-17 03:38:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:24,937 INFO L124 PetriNetUnfolderBase]: 2930/5313 cut-off events. [2024-11-17 03:38:24,937 INFO L125 PetriNetUnfolderBase]: For 14972/15109 co-relation queries the response was YES. [2024-11-17 03:38:24,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18047 conditions, 5313 events. 2930/5313 cut-off events. For 14972/15109 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 36209 event pairs, 1087 based on Foata normal form. 120/5261 useless extension candidates. Maximal degree in co-relation 13681. Up to 1442 conditions per place. [2024-11-17 03:38:24,976 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 119 selfloop transitions, 15 changer transitions 0/156 dead transitions. [2024-11-17 03:38:24,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 156 transitions, 1182 flow [2024-11-17 03:38:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:38:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:38:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-11-17 03:38:24,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-17 03:38:24,978 INFO L175 Difference]: Start difference. First operand has 110 places, 76 transitions, 501 flow. Second operand 10 states and 280 transitions. [2024-11-17 03:38:24,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 156 transitions, 1182 flow [2024-11-17 03:38:24,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 156 transitions, 1085 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-11-17 03:38:24,998 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 523 flow [2024-11-17 03:38:24,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=523, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2024-11-17 03:38:25,002 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-11-17 03:38:25,003 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 523 flow [2024-11-17 03:38:25,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.95) internal successors, (379), 20 states have internal predecessors, (379), 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 03:38:25,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:25,003 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:25,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:25,204 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,SelfDestructingSolverStorable13 [2024-11-17 03:38:25,204 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:25,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:25,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1606580001, now seen corresponding path program 3 times [2024-11-17 03:38:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914118237] [2024-11-17 03:38:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914118237] [2024-11-17 03:38:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914118237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96964080] [2024-11-17 03:38:25,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:38:25,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:25,384 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 03:38:25,385 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 03:38:25,447 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:38:25,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:25,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:38:25,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:38:25,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:25,910 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 13 treesize of output 11 [2024-11-17 03:38:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:38:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96964080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:25,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-17 03:38:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61757360] [2024-11-17 03:38:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:25,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:38:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:38:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:38:26,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 56 [2024-11-17 03:38:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 523 flow. Second operand has 24 states, 24 states have (on average 17.208333333333332) internal successors, (413), 24 states have internal predecessors, (413), 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 03:38:26,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:26,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 56 [2024-11-17 03:38:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:28,153 INFO L124 PetriNetUnfolderBase]: 7068/11135 cut-off events. [2024-11-17 03:38:28,153 INFO L125 PetriNetUnfolderBase]: For 27639/27831 co-relation queries the response was YES. [2024-11-17 03:38:28,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38469 conditions, 11135 events. 7068/11135 cut-off events. For 27639/27831 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 74874 event pairs, 1180 based on Foata normal form. 239/11289 useless extension candidates. Maximal degree in co-relation 29287. Up to 1354 conditions per place. [2024-11-17 03:38:28,233 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 269 selfloop transitions, 40 changer transitions 0/324 dead transitions. [2024-11-17 03:38:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 324 transitions, 2493 flow [2024-11-17 03:38:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-17 03:38:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-17 03:38:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 540 transitions. [2024-11-17 03:38:28,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-11-17 03:38:28,235 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 523 flow. Second operand 22 states and 540 transitions. [2024-11-17 03:38:28,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 324 transitions, 2493 flow [2024-11-17 03:38:28,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 324 transitions, 2459 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:28,273 INFO L231 Difference]: Finished difference. Result has 133 places, 95 transitions, 728 flow [2024-11-17 03:38:28,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=728, PETRI_PLACES=133, PETRI_TRANSITIONS=95} [2024-11-17 03:38:28,274 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-11-17 03:38:28,274 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 95 transitions, 728 flow [2024-11-17 03:38:28,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 17.208333333333332) internal successors, (413), 24 states have internal predecessors, (413), 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 03:38:28,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:28,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:28,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:38:28,475 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,SelfDestructingSolverStorable14 [2024-11-17 03:38:28,475 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:28,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash 521965118, now seen corresponding path program 1 times [2024-11-17 03:38:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807366888] [2024-11-17 03:38:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:28,502 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 03:38:28,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:28,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807366888] [2024-11-17 03:38:28,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807366888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:28,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:28,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778548911] [2024-11-17 03:38:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:28,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:38:28,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:38:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:38:28,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-17 03:38:28,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 95 transitions, 728 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:28,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:28,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-17 03:38:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:29,182 INFO L124 PetriNetUnfolderBase]: 4714/8632 cut-off events. [2024-11-17 03:38:29,182 INFO L125 PetriNetUnfolderBase]: For 29847/29991 co-relation queries the response was YES. [2024-11-17 03:38:29,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32899 conditions, 8632 events. 4714/8632 cut-off events. For 29847/29991 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 65150 event pairs, 1088 based on Foata normal form. 10/8463 useless extension candidates. Maximal degree in co-relation 28583. Up to 5736 conditions per place. [2024-11-17 03:38:29,240 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 77 selfloop transitions, 6 changer transitions 10/120 dead transitions. [2024-11-17 03:38:29,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 120 transitions, 1083 flow [2024-11-17 03:38:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:38:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:38:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-17 03:38:29,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-17 03:38:29,242 INFO L175 Difference]: Start difference. First operand has 133 places, 95 transitions, 728 flow. Second operand 3 states and 98 transitions. [2024-11-17 03:38:29,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 120 transitions, 1083 flow [2024-11-17 03:38:29,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 120 transitions, 1014 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-11-17 03:38:29,281 INFO L231 Difference]: Finished difference. Result has 128 places, 91 transitions, 652 flow [2024-11-17 03:38:29,281 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=652, PETRI_PLACES=128, PETRI_TRANSITIONS=91} [2024-11-17 03:38:29,282 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-11-17 03:38:29,282 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 91 transitions, 652 flow [2024-11-17 03:38:29,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:29,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:29,282 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:29,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:38:29,282 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:29,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:29,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1695695341, now seen corresponding path program 1 times [2024-11-17 03:38:29,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:29,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067404809] [2024-11-17 03:38:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:29,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067404809] [2024-11-17 03:38:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067404809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503039396] [2024-11-17 03:38:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:29,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:29,416 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 03:38:29,421 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 03:38:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:29,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:29,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:29,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503039396] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:29,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-17 03:38:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133401321] [2024-11-17 03:38:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:29,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:38:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:38:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:29,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2024-11-17 03:38:29,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 91 transitions, 652 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 03:38:29,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:29,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2024-11-17 03:38:29,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:31,752 INFO L124 PetriNetUnfolderBase]: 11552/17573 cut-off events. [2024-11-17 03:38:31,753 INFO L125 PetriNetUnfolderBase]: For 61596/61970 co-relation queries the response was YES. [2024-11-17 03:38:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67077 conditions, 17573 events. 11552/17573 cut-off events. For 61596/61970 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 121066 event pairs, 3379 based on Foata normal form. 202/17638 useless extension candidates. Maximal degree in co-relation 59002. Up to 6490 conditions per place. [2024-11-17 03:38:31,901 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 217 selfloop transitions, 36 changer transitions 0/265 dead transitions. [2024-11-17 03:38:31,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 265 transitions, 2339 flow [2024-11-17 03:38:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:38:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:38:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-11-17 03:38:31,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-17 03:38:31,905 INFO L175 Difference]: Start difference. First operand has 128 places, 91 transitions, 652 flow. Second operand 11 states and 266 transitions. [2024-11-17 03:38:31,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 265 transitions, 2339 flow [2024-11-17 03:38:32,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 265 transitions, 2178 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-11-17 03:38:32,137 INFO L231 Difference]: Finished difference. Result has 124 places, 113 transitions, 849 flow [2024-11-17 03:38:32,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2024-11-17 03:38:32,138 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-11-17 03:38:32,138 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 849 flow [2024-11-17 03:38:32,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 03:38:32,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:32,138 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:32,152 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 03:38:32,342 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,SelfDestructingSolverStorable16 [2024-11-17 03:38:32,343 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:32,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:32,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1589480971, now seen corresponding path program 2 times [2024-11-17 03:38:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:32,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379861760] [2024-11-17 03:38:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:32,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379861760] [2024-11-17 03:38:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379861760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340690308] [2024-11-17 03:38:32,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:38:32,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:32,440 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 03:38:32,441 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 03:38:32,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:38:32,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:32,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:32,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:32,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340690308] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:32,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:32,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-17 03:38:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827167042] [2024-11-17 03:38:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:32,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:38:32,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:32,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:38:32,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:32,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2024-11-17 03:38:32,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 03:38:32,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:32,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2024-11-17 03:38:32,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:35,668 INFO L124 PetriNetUnfolderBase]: 15656/23644 cut-off events. [2024-11-17 03:38:35,669 INFO L125 PetriNetUnfolderBase]: For 83518/83876 co-relation queries the response was YES. [2024-11-17 03:38:35,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90969 conditions, 23644 events. 15656/23644 cut-off events. For 83518/83876 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 167905 event pairs, 3522 based on Foata normal form. 274/23672 useless extension candidates. Maximal degree in co-relation 54805. Up to 6550 conditions per place. [2024-11-17 03:38:35,937 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 219 selfloop transitions, 53 changer transitions 0/284 dead transitions. [2024-11-17 03:38:35,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 284 transitions, 2648 flow [2024-11-17 03:38:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:38:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:38:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-11-17 03:38:35,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41865079365079366 [2024-11-17 03:38:35,940 INFO L175 Difference]: Start difference. First operand has 124 places, 113 transitions, 849 flow. Second operand 9 states and 211 transitions. [2024-11-17 03:38:35,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 284 transitions, 2648 flow [2024-11-17 03:38:36,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 284 transitions, 2645 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:36,137 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1363 flow [2024-11-17 03:38:36,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1363, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-11-17 03:38:36,138 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-11-17 03:38:36,138 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1363 flow [2024-11-17 03:38:36,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 03:38:36,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:36,138 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:36,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:38:36,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:38:36,339 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:36,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1778027591, now seen corresponding path program 3 times [2024-11-17 03:38:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:36,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600908099] [2024-11-17 03:38:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:36,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600908099] [2024-11-17 03:38:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600908099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:36,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761015276] [2024-11-17 03:38:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:38:36,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:36,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:36,454 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 03:38:36,455 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 03:38:36,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:38:36,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:36,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:36,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761015276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:36,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:36,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-17 03:38:36,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667338817] [2024-11-17 03:38:36,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:36,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:38:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:38:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:38:36,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2024-11-17 03:38:36,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1363 flow. Second operand has 15 states, 15 states have (on average 16.266666666666666) internal successors, (244), 15 states have internal predecessors, (244), 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 03:38:36,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:36,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2024-11-17 03:38:36,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:40,987 INFO L124 PetriNetUnfolderBase]: 21919/33007 cut-off events. [2024-11-17 03:38:40,988 INFO L125 PetriNetUnfolderBase]: For 178837/179283 co-relation queries the response was YES. [2024-11-17 03:38:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144693 conditions, 33007 events. 21919/33007 cut-off events. For 178837/179283 co-relation queries the response was YES. Maximal size of possible extension queue 1287. Compared 240822 event pairs, 5247 based on Foata normal form. 278/33124 useless extension candidates. Maximal degree in co-relation 107097. Up to 11929 conditions per place. [2024-11-17 03:38:41,287 INFO L140 encePairwiseOnDemand]: 41/56 looper letters, 295 selfloop transitions, 130 changer transitions 0/437 dead transitions. [2024-11-17 03:38:41,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 437 transitions, 4551 flow [2024-11-17 03:38:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 03:38:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-17 03:38:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 373 transitions. [2024-11-17 03:38:41,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41629464285714285 [2024-11-17 03:38:41,289 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1363 flow. Second operand 16 states and 373 transitions. [2024-11-17 03:38:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 437 transitions, 4551 flow [2024-11-17 03:38:42,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 437 transitions, 4508 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:42,723 INFO L231 Difference]: Finished difference. Result has 158 places, 221 transitions, 2755 flow [2024-11-17 03:38:42,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2755, PETRI_PLACES=158, PETRI_TRANSITIONS=221} [2024-11-17 03:38:42,724 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-11-17 03:38:42,724 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 221 transitions, 2755 flow [2024-11-17 03:38:42,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.266666666666666) internal successors, (244), 15 states have internal predecessors, (244), 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 03:38:42,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:42,725 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:42,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:38:42,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:42,928 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:42,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -756989233, now seen corresponding path program 4 times [2024-11-17 03:38:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:42,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060296766] [2024-11-17 03:38:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060296766] [2024-11-17 03:38:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060296766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168438287] [2024-11-17 03:38:43,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:38:43,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:43,121 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:43,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:38:43,188 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:38:43,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:43,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:38:43,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:43,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168438287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:43,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:38:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968642967] [2024-11-17 03:38:43,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:43,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:43,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:43,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 56 [2024-11-17 03:38:43,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 221 transitions, 2755 flow. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 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 03:38:43,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:43,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 56 [2024-11-17 03:38:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:51,728 INFO L124 PetriNetUnfolderBase]: 40386/59008 cut-off events. [2024-11-17 03:38:51,728 INFO L125 PetriNetUnfolderBase]: For 425897/425953 co-relation queries the response was YES. [2024-11-17 03:38:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293521 conditions, 59008 events. 40386/59008 cut-off events. For 425897/425953 co-relation queries the response was YES. Maximal size of possible extension queue 1740. Compared 421037 event pairs, 5379 based on Foata normal form. 176/59124 useless extension candidates. Maximal degree in co-relation 251149. Up to 15020 conditions per place. [2024-11-17 03:38:52,561 INFO L140 encePairwiseOnDemand]: 40/56 looper letters, 590 selfloop transitions, 333 changer transitions 0/928 dead transitions. [2024-11-17 03:38:52,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 928 transitions, 11800 flow [2024-11-17 03:38:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:38:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:38:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 521 transitions. [2024-11-17 03:38:52,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38764880952380953 [2024-11-17 03:38:52,564 INFO L175 Difference]: Start difference. First operand has 158 places, 221 transitions, 2755 flow. Second operand 24 states and 521 transitions. [2024-11-17 03:38:52,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 928 transitions, 11800 flow [2024-11-17 03:38:58,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 928 transitions, 11651 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:58,390 INFO L231 Difference]: Finished difference. Result has 193 places, 476 transitions, 7238 flow [2024-11-17 03:38:58,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7238, PETRI_PLACES=193, PETRI_TRANSITIONS=476} [2024-11-17 03:38:58,391 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 139 predicate places. [2024-11-17 03:38:58,391 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 476 transitions, 7238 flow [2024-11-17 03:38:58,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 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 03:38:58,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:58,392 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:58,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:38:58,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-17 03:38:58,593 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:38:58,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 822258529, now seen corresponding path program 5 times [2024-11-17 03:38:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539877565] [2024-11-17 03:38:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:58,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539877565] [2024-11-17 03:38:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539877565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28925754] [2024-11-17 03:38:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:38:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:58,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:38:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:38:58,746 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:38:58,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:58,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:38:58,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:58,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:58,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28925754] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:58,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:58,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-11-17 03:38:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833015510] [2024-11-17 03:38:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:58,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:38:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:38:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:38:58,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2024-11-17 03:38:58,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 476 transitions, 7238 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 03:38:58,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:58,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2024-11-17 03:38:58,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:10,288 INFO L124 PetriNetUnfolderBase]: 45986/67417 cut-off events. [2024-11-17 03:39:10,289 INFO L125 PetriNetUnfolderBase]: For 692129/692273 co-relation queries the response was YES. [2024-11-17 03:39:11,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377006 conditions, 67417 events. 45986/67417 cut-off events. For 692129/692273 co-relation queries the response was YES. Maximal size of possible extension queue 1966. Compared 487716 event pairs, 10342 based on Foata normal form. 160/67523 useless extension candidates. Maximal degree in co-relation 369020. Up to 24818 conditions per place. [2024-11-17 03:39:11,593 INFO L140 encePairwiseOnDemand]: 42/56 looper letters, 553 selfloop transitions, 402 changer transitions 0/963 dead transitions. [2024-11-17 03:39:11,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 963 transitions, 14759 flow [2024-11-17 03:39:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:39:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:39:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 335 transitions. [2024-11-17 03:39:11,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46016483516483514 [2024-11-17 03:39:11,594 INFO L175 Difference]: Start difference. First operand has 193 places, 476 transitions, 7238 flow. Second operand 13 states and 335 transitions. [2024-11-17 03:39:11,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 963 transitions, 14759 flow [2024-11-17 03:39:25,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 963 transitions, 14581 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:25,223 INFO L231 Difference]: Finished difference. Result has 210 places, 686 transitions, 11393 flow [2024-11-17 03:39:25,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11393, PETRI_PLACES=210, PETRI_TRANSITIONS=686} [2024-11-17 03:39:25,224 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 156 predicate places. [2024-11-17 03:39:25,224 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 686 transitions, 11393 flow [2024-11-17 03:39:25,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 03:39:25,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:25,225 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:25,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:25,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:25,425 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-17 03:39:25,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1857151363, now seen corresponding path program 6 times [2024-11-17 03:39:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838369745] [2024-11-17 03:39:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838369745] [2024-11-17 03:39:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838369745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865670807] [2024-11-17 03:39:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-17 03:39:25,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:25,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:25,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:39:25,575 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-17 03:39:25,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:25,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:39:25,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:25,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865670807] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:25,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:39:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-17 03:39:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400354008] [2024-11-17 03:39:25,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:25,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:39:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:39:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:39:25,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 56 [2024-11-17 03:39:25,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 686 transitions, 11393 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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 03:39:25,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:25,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 56 [2024-11-17 03:39:25,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand