./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:30:06,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:30:06,555 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:30:06,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:30:06,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:30:06,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:30:06,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:30:06,613 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:30:06,614 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:30:06,614 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:30:06,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:30:06,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:30:06,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:30:06,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:30:06,616 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:30:06,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:30:06,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:30:06,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:30:06,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:30:06,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:30:06,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:30:06,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:30:06,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:30:06,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:30:06,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:30:06,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:30:06,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:30:06,624 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:30:06,625 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:30:06,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:30:06,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:30:06,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:30:06,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:30:06,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:30:06,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:30:06,626 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:30:06,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:30:06,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:30:06,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:30:06,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:30:06,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:30:06,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:30:06,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-16 19:30:06,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:30:06,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:30:06,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:30:06,891 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:30:06,891 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:30:06,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-16 19:30:08,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:30:08,456 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:30:08,457 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-16 19:30:08,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c98ff3c4/33e9124b39e04097962430aa4b747b8a/FLAG7cfa70aeb [2024-11-16 19:30:08,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c98ff3c4/33e9124b39e04097962430aa4b747b8a [2024-11-16 19:30:08,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:30:08,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:30:08,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:30:08,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:30:08,484 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:30:08,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ba549b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08, skipping insertion in model container [2024-11-16 19:30:08,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:30:08,801 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2423,2436] [2024-11-16 19:30:08,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:30:08,828 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:30:08,851 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2423,2436] [2024-11-16 19:30:08,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:30:08,878 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:30:08,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08 WrapperNode [2024-11-16 19:30:08,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:30:08,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:30:08,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:30:08,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:30:08,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,942 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 259 [2024-11-16 19:30:08,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:30:08,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:30:08,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:30:08,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:30:08,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:08,993 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-16 19:30:08,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,006 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,007 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:30:09,015 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:30:09,015 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:30:09,016 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:30:09,016 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (1/1) ... [2024-11-16 19:30:09,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:30:09,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:09,054 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) [2024-11-16 19:30:09,062 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 [2024-11-16 19:30:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:30:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:30:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:30:09,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:30:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:30:09,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:30:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:30:09,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:30:09,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:30:09,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:30:09,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:30:09,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:30:09,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:30:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:30:09,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:30:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:30:09,131 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:30:09,341 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:30:09,344 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:30:09,659 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:30:09,659 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:30:09,946 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:30:09,946 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:30:09,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:30:09 BoogieIcfgContainer [2024-11-16 19:30:09,951 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:30:09,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:30:09,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:30:09,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:30:09,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:30:08" (1/3) ... [2024-11-16 19:30:09,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44087d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:30:09, skipping insertion in model container [2024-11-16 19:30:09,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:08" (2/3) ... [2024-11-16 19:30:09,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44087d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:30:09, skipping insertion in model container [2024-11-16 19:30:09,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:30:09" (3/3) ... [2024-11-16 19:30:09,961 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-16 19:30:09,975 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:30:09,976 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:30:09,976 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:30:10,040 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:30:10,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 48 transitions, 117 flow [2024-11-16 19:30:10,098 INFO L124 PetriNetUnfolderBase]: 10/45 cut-off events. [2024-11-16 19:30:10,098 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:30:10,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 10/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-16 19:30:10,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 48 transitions, 117 flow [2024-11-16 19:30:10,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 44 transitions, 106 flow [2024-11-16 19:30:10,114 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:30:10,121 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=LoopHeads, 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;@654d7323, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:30:10,122 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:30:10,132 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:30:10,133 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2024-11-16 19:30:10,133 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:30:10,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:10,134 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] [2024-11-16 19:30:10,134 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:10,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:10,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1650095955, now seen corresponding path program 1 times [2024-11-16 19:30:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:10,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125379992] [2024-11-16 19:30:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125379992] [2024-11-16 19:30:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125379992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:30:10,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:30:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:30:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549486416] [2024-11-16 19:30:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:30:10,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:30:10,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:30:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:30:10,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-16 19:30:10,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2024-11-16 19:30:10,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:10,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-16 19:30:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:10,520 INFO L124 PetriNetUnfolderBase]: 499/787 cut-off events. [2024-11-16 19:30:10,520 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-16 19:30:10,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 787 events. 499/787 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3437 event pairs, 358 based on Foata normal form. 141/903 useless extension candidates. Maximal degree in co-relation 1352. Up to 721 conditions per place. [2024-11-16 19:30:10,526 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 28 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2024-11-16 19:30:10,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 152 flow [2024-11-16 19:30:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:30:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:30:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2024-11-16 19:30:10,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-16 19:30:10,535 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 106 flow. Second operand 2 states and 61 transitions. [2024-11-16 19:30:10,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 152 flow [2024-11-16 19:30:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 140 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-16 19:30:10,539 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 84 flow [2024-11-16 19:30:10,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2024-11-16 19:30:10,542 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-16 19:30:10,542 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 84 flow [2024-11-16 19:30:10,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2024-11-16 19:30:10,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:10,543 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, 1, 1, 1] [2024-11-16 19:30:10,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:30:10,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:10,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1769778544, now seen corresponding path program 1 times [2024-11-16 19:30:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549569772] [2024-11-16 19:30:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549569772] [2024-11-16 19:30:10,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549569772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:30:10,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:30:10,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:30:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274686604] [2024-11-16 19:30:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:30:10,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:30:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:30:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:30:10,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-16 19:30:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2024-11-16 19:30:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-16 19:30:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:10,843 INFO L124 PetriNetUnfolderBase]: 818/1355 cut-off events. [2024-11-16 19:30:10,844 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-16 19:30:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2570 conditions, 1355 events. 818/1355 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7172 event pairs, 226 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 2567. Up to 803 conditions per place. [2024-11-16 19:30:10,854 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 42 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2024-11-16 19:30:10,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 221 flow [2024-11-16 19:30:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:30:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:30:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-16 19:30:10,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-16 19:30:10,857 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 84 flow. Second operand 3 states and 90 transitions. [2024-11-16 19:30:10,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 221 flow [2024-11-16 19:30:10,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:30:10,860 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 110 flow [2024-11-16 19:30:10,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2024-11-16 19:30:10,861 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-11-16 19:30:10,861 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 110 flow [2024-11-16 19:30:10,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2024-11-16 19:30:10,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:10,862 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-11-16 19:30:10,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:30:10,863 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:10,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 184864565, now seen corresponding path program 1 times [2024-11-16 19:30:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266438160] [2024-11-16 19:30:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:10,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:30:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266438160] [2024-11-16 19:30:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266438160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:30:11,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:30:11,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:30:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450216779] [2024-11-16 19:30:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:30:11,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:30:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:30:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:30:11,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-11-16 19:30:11,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-16 19:30:11,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:11,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-11-16 19:30:11,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:11,227 INFO L124 PetriNetUnfolderBase]: 819/1322 cut-off events. [2024-11-16 19:30:11,228 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-11-16 19:30:11,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 1322 events. 819/1322 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6741 event pairs, 577 based on Foata normal form. 1/1279 useless extension candidates. Maximal degree in co-relation 2893. Up to 1183 conditions per place. [2024-11-16 19:30:11,235 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 31 selfloop transitions, 4 changer transitions 4/48 dead transitions. [2024-11-16 19:30:11,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 200 flow [2024-11-16 19:30:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:30:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:30:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-16 19:30:11,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2024-11-16 19:30:11,236 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 110 flow. Second operand 4 states and 86 transitions. [2024-11-16 19:30:11,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 200 flow [2024-11-16 19:30:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:30:11,238 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 134 flow [2024-11-16 19:30:11,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-16 19:30:11,238 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-16 19:30:11,238 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 134 flow [2024-11-16 19:30:11,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-16 19:30:11,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:11,239 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:11,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:30:11,239 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:11,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1682430427, now seen corresponding path program 1 times [2024-11-16 19:30:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126898497] [2024-11-16 19:30:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:30:11,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:11,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126898497] [2024-11-16 19:30:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126898497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:30:11,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:30:11,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:30:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378064240] [2024-11-16 19:30:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:30:11,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:30:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:30:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:30:11,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-11-16 19:30:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-16 19:30:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:11,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-11-16 19:30:11,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:11,462 INFO L124 PetriNetUnfolderBase]: 916/1452 cut-off events. [2024-11-16 19:30:11,462 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-11-16 19:30:11,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3088 conditions, 1452 events. 916/1452 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7163 event pairs, 332 based on Foata normal form. 0/1395 useless extension candidates. Maximal degree in co-relation 3081. Up to 696 conditions per place. [2024-11-16 19:30:11,468 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-16 19:30:11,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 268 flow [2024-11-16 19:30:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:30:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:30:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-16 19:30:11,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-11-16 19:30:11,472 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 134 flow. Second operand 4 states and 94 transitions. [2024-11-16 19:30:11,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 268 flow [2024-11-16 19:30:11,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 258 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-16 19:30:11,475 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 145 flow [2024-11-16 19:30:11,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-16 19:30:11,476 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-11-16 19:30:11,476 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 145 flow [2024-11-16 19:30:11,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-16 19:30:11,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:11,477 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:11,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:30:11,477 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:11,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash -971180042, now seen corresponding path program 1 times [2024-11-16 19:30:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:11,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049946526] [2024-11-16 19:30:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:11,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:30:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049946526] [2024-11-16 19:30:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049946526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090415423] [2024-11-16 19:30:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:11,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:11,611 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) [2024-11-16 19:30:11,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:30:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:11,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:30:11,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:30:11,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:30:11,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090415423] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:11,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:30:11,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-16 19:30:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178614342] [2024-11-16 19:30:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:30:11,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:30:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:30:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:30:11,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-11-16 19:30:11,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:30:11,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:11,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-11-16 19:30:11,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:11,989 INFO L124 PetriNetUnfolderBase]: 1053/1746 cut-off events. [2024-11-16 19:30:11,990 INFO L125 PetriNetUnfolderBase]: For 788/789 co-relation queries the response was YES. [2024-11-16 19:30:11,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 1746 events. 1053/1746 cut-off events. For 788/789 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9084 event pairs, 559 based on Foata normal form. 98/1811 useless extension candidates. Maximal degree in co-relation 4105. Up to 1177 conditions per place. [2024-11-16 19:30:11,998 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 51 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-16 19:30:11,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 321 flow [2024-11-16 19:30:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:30:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:30:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-16 19:30:12,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-16 19:30:12,002 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 145 flow. Second operand 5 states and 104 transitions. [2024-11-16 19:30:12,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 321 flow [2024-11-16 19:30:12,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:30:12,006 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 162 flow [2024-11-16 19:30:12,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-16 19:30:12,007 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-11-16 19:30:12,010 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 162 flow [2024-11-16 19:30:12,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:30:12,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:12,010 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:12,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:30:12,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:12,212 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:30:12,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1522477129, now seen corresponding path program 1 times [2024-11-16 19:30:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:12,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471664324] [2024-11-16 19:30:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:12,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471664324] [2024-11-16 19:30:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471664324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586763503] [2024-11-16 19:30:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:13,883 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) [2024-11-16 19:30:13,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:30:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:13,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 19:30:13,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:14,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-16 19:30:14,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-16 19:30:14,178 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-16 19:30:14,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-16 19:30:14,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:30:14,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 19:30:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:14,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:31,697 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-16 19:30:31,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1682 treesize of output 1252 [2024-11-16 19:30:31,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:30:31,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 737 treesize of output 693 [2024-11-16 19:30:34,786 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 49 treesize of output 43 [2024-11-16 19:30:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:42,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586763503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:42,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:42,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2024-11-16 19:30:42,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386891092] [2024-11-16 19:30:42,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:42,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 19:30:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 19:30:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=902, Unknown=6, NotChecked=0, Total=1056 [2024-11-16 19:30:46,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:30:50,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:30:55,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:30:59,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:30:59,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-16 19:30:59,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 162 flow. Second operand has 33 states, 33 states have (on average 11.303030303030303) internal successors, (373), 33 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:59,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:59,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-16 19:30:59,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:04,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:31:16,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:31:20,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:31:24,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 19:31:27,925 INFO L124 PetriNetUnfolderBase]: 3161/4891 cut-off events. [2024-11-16 19:31:27,925 INFO L125 PetriNetUnfolderBase]: For 3595/3595 co-relation queries the response was YES. [2024-11-16 19:31:27,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12525 conditions, 4891 events. 3161/4891 cut-off events. For 3595/3595 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26808 event pairs, 155 based on Foata normal form. 2/4643 useless extension candidates. Maximal degree in co-relation 12516. Up to 2295 conditions per place. [2024-11-16 19:31:27,952 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 154 selfloop transitions, 46 changer transitions 2/208 dead transitions. [2024-11-16 19:31:27,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 208 transitions, 1071 flow [2024-11-16 19:31:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 19:31:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-16 19:31:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 391 transitions. [2024-11-16 19:31:27,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3878968253968254 [2024-11-16 19:31:27,955 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 162 flow. Second operand 21 states and 391 transitions. [2024-11-16 19:31:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 208 transitions, 1071 flow [2024-11-16 19:31:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 208 transitions, 1063 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:31:27,963 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 488 flow [2024-11-16 19:31:27,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=488, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2024-11-16 19:31:27,965 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-11-16 19:31:27,966 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 488 flow [2024-11-16 19:31:27,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.303030303030303) internal successors, (373), 33 states have internal predecessors, (373), 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) [2024-11-16 19:31:27,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:27,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:27,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:31:28,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-16 19:31:28,171 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:28,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1283975425, now seen corresponding path program 2 times [2024-11-16 19:31:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762060232] [2024-11-16 19:31:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:29,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762060232] [2024-11-16 19:31:29,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762060232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555152910] [2024-11-16 19:31:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:31:29,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:29,241 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) [2024-11-16 19:31:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:31:29,340 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:31:29,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:29,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-16 19:31:29,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:29,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-16 19:31:30,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:30,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:31:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:30,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:30,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:30,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-16 19:31:31,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:31,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 227 [2024-11-16 19:31:31,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:31,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 134 [2024-11-16 19:31:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555152910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:31,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:31,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2024-11-16 19:31:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034682655] [2024-11-16 19:31:31,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:31,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 19:31:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 19:31:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2024-11-16 19:31:32,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-16 19:31:32,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 488 flow. Second operand has 32 states, 32 states have (on average 12.3125) internal successors, (394), 32 states have internal predecessors, (394), 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) [2024-11-16 19:31:32,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:32,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-16 19:31:32,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:37,066 INFO L124 PetriNetUnfolderBase]: 4407/6764 cut-off events. [2024-11-16 19:31:37,066 INFO L125 PetriNetUnfolderBase]: For 8315/8315 co-relation queries the response was YES. [2024-11-16 19:31:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20088 conditions, 6764 events. 4407/6764 cut-off events. For 8315/8315 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 39709 event pairs, 839 based on Foata normal form. 2/6741 useless extension candidates. Maximal degree in co-relation 20072. Up to 3832 conditions per place. [2024-11-16 19:31:37,101 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 220 selfloop transitions, 86 changer transitions 2/315 dead transitions. [2024-11-16 19:31:37,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 315 transitions, 1996 flow [2024-11-16 19:31:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 19:31:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-16 19:31:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 581 transitions. [2024-11-16 19:31:37,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904569892473118 [2024-11-16 19:31:37,104 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 488 flow. Second operand 31 states and 581 transitions. [2024-11-16 19:31:37,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 315 transitions, 1996 flow [2024-11-16 19:31:37,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 315 transitions, 1902 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-11-16 19:31:37,115 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1181 flow [2024-11-16 19:31:37,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1181, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-11-16 19:31:37,116 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-11-16 19:31:37,116 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1181 flow [2024-11-16 19:31:37,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 12.3125) internal successors, (394), 32 states have internal predecessors, (394), 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) [2024-11-16 19:31:37,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:37,117 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:37,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:31:37,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:37,318 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:37,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -982154047, now seen corresponding path program 3 times [2024-11-16 19:31:37,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:37,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264038343] [2024-11-16 19:31:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:37,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:31:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:38,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:31:38,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264038343] [2024-11-16 19:31:38,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264038343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:31:38,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977408989] [2024-11-16 19:31:38,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:31:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:38,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:31:38,737 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) [2024-11-16 19:31:38,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:31:38,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:31:38,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:31:38,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-16 19:31:38,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:31:39,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-16 19:31:39,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:39,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:31:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:39,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:31:40,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:40,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-16 19:31:41,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:41,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 227 [2024-11-16 19:31:41,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:31:41,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 130 [2024-11-16 19:31:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:31:41,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977408989] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:31:41,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:31:41,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2024-11-16 19:31:41,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632016246] [2024-11-16 19:31:41,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:31:41,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 19:31:41,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:31:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 19:31:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2024-11-16 19:31:42,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-16 19:31:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1181 flow. Second operand has 32 states, 32 states have (on average 12.34375) internal successors, (395), 32 states have internal predecessors, (395), 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) [2024-11-16 19:31:42,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:31:42,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-16 19:31:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:31:46,438 INFO L124 PetriNetUnfolderBase]: 6037/9301 cut-off events. [2024-11-16 19:31:46,439 INFO L125 PetriNetUnfolderBase]: For 29288/29312 co-relation queries the response was YES. [2024-11-16 19:31:46,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33327 conditions, 9301 events. 6037/9301 cut-off events. For 29288/29312 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 58687 event pairs, 1143 based on Foata normal form. 2/9280 useless extension candidates. Maximal degree in co-relation 33294. Up to 6238 conditions per place. [2024-11-16 19:31:46,489 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 254 selfloop transitions, 91 changer transitions 2/354 dead transitions. [2024-11-16 19:31:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 354 transitions, 2860 flow [2024-11-16 19:31:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 19:31:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-16 19:31:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 508 transitions. [2024-11-16 19:31:46,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-11-16 19:31:46,491 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1181 flow. Second operand 26 states and 508 transitions. [2024-11-16 19:31:46,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 354 transitions, 2860 flow [2024-11-16 19:31:46,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 354 transitions, 2744 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-11-16 19:31:46,623 INFO L231 Difference]: Finished difference. Result has 143 places, 207 transitions, 1904 flow [2024-11-16 19:31:46,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1904, PETRI_PLACES=143, PETRI_TRANSITIONS=207} [2024-11-16 19:31:46,624 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-11-16 19:31:46,624 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 207 transitions, 1904 flow [2024-11-16 19:31:46,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 12.34375) internal successors, (395), 32 states have internal predecessors, (395), 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) [2024-11-16 19:31:46,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:31:46,625 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:31:46,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:31:46,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:31:46,826 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:31:46,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:31:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash 811259085, now seen corresponding path program 4 times [2024-11-16 19:31:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:31:46,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3535321] [2024-11-16 19:31:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:31:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:31:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat