./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.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 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:29:17,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:29:17,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:29:17,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:29:17,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:29:17,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:29:17,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:29:17,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:29:17,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:29:17,632 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:29:17,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:29:17,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:29:17,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:29:17,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:29:17,636 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:29:17,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:29:17,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:29:17,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:29:17,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:29:17,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:29:17,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:29:17,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:29:17,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:29:17,643 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:29:17,645 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:29:17,645 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:29:17,645 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:29:17,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:29:17,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:29:17,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:29:17,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:29:17,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:29:17,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:29:17,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:29:17,648 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:29:17,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:29:17,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:29:17,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:29:17,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:29:17,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:29:17,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:29:17,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:29:17,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2024-10-24 12:29:17,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:29:17,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:29:17,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:29:17,959 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:29:17,959 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:29:17,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2024-10-24 12:29:19,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:29:19,701 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:29:19,702 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2024-10-24 12:29:19,710 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53348c5d0/c6bf83a0b0dd40adbea5f9b728d6a925/FLAG39e73202b [2024-10-24 12:29:19,725 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53348c5d0/c6bf83a0b0dd40adbea5f9b728d6a925 [2024-10-24 12:29:19,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:29:19,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:29:19,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:29:19,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:29:19,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:29:19,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:19" (1/1) ... [2024-10-24 12:29:19,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbaa709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:19, skipping insertion in model container [2024-10-24 12:29:19,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:19" (1/1) ... [2024-10-24 12:29:19,763 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:29:19,996 WARN L248 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/loop-tiling-eq.wvr.c[2644,2657] [2024-10-24 12:29:20,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:29:20,032 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:29:20,063 WARN L248 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/loop-tiling-eq.wvr.c[2644,2657] [2024-10-24 12:29:20,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:29:20,107 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:29:20,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20 WrapperNode [2024-10-24 12:29:20,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:29:20,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:29:20,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:29:20,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:29:20,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,170 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 184 [2024-10-24 12:29:20,171 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:29:20,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:29:20,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:29:20,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:29:20,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,188 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,211 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 9, 3]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 5, 1]. [2024-10-24 12:29:20,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,225 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:29:20,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:29:20,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:29:20,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:29:20,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (1/1) ... [2024-10-24 12:29:20,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:29:20,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:29:20,280 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) [2024-10-24 12:29:20,284 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 [2024-10-24 12:29:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 12:29:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 12:29:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 12:29:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:29:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:29:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:29:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:29:20,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:29:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:29:20,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:29:20,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:29:20,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:29:20,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:29:20,344 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:29:20,503 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:29:20,506 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:29:20,931 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:29:20,931 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:29:21,335 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:29:21,336 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-24 12:29:21,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:21 BoogieIcfgContainer [2024-10-24 12:29:21,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:29:21,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:29:21,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:29:21,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:29:21,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:29:19" (1/3) ... [2024-10-24 12:29:21,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfab59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:21, skipping insertion in model container [2024-10-24 12:29:21,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:20" (2/3) ... [2024-10-24 12:29:21,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfab59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:21, skipping insertion in model container [2024-10-24 12:29:21,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:21" (3/3) ... [2024-10-24 12:29:21,348 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2024-10-24 12:29:21,367 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:29:21,368 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:29:21,368 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:29:21,413 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:29:21,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 28 transitions, 70 flow [2024-10-24 12:29:21,498 INFO L124 PetriNetUnfolderBase]: 7/26 cut-off events. [2024-10-24 12:29:21,498 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:29:21,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 7/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2024-10-24 12:29:21,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 28 transitions, 70 flow [2024-10-24 12:29:21,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 25 transitions, 62 flow [2024-10-24 12:29:21,517 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:29:21,526 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;@670b3d0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:29:21,526 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:29:21,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:29:21,540 INFO L124 PetriNetUnfolderBase]: 7/24 cut-off events. [2024-10-24 12:29:21,541 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:29:21,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:21,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:29:21,542 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:21,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -245453930, now seen corresponding path program 1 times [2024-10-24 12:29:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:21,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760919984] [2024-10-24 12:29:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760919984] [2024-10-24 12:29:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760919984] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:29:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:29:22,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:29:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618416771] [2024-10-24 12:29:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:29:22,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:29:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:29:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:29:22,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:22,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-10-24 12:29:22,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:22,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:22,254 INFO L124 PetriNetUnfolderBase]: 113/193 cut-off events. [2024-10-24 12:29:22,254 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-24 12:29:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 193 events. 113/193 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 471 event pairs, 60 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 162. Up to 100 conditions per place. [2024-10-24 12:29:22,260 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 25 selfloop transitions, 2 changer transitions 15/43 dead transitions. [2024-10-24 12:29:22,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 194 flow [2024-10-24 12:29:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:29:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:29:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-10-24 12:29:22,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-10-24 12:29:22,277 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 55 transitions. [2024-10-24 12:29:22,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 194 flow [2024-10-24 12:29:22,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:29:22,284 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 68 flow [2024-10-24 12:29:22,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-10-24 12:29:22,289 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2024-10-24 12:29:22,289 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 68 flow [2024-10-24 12:29:22,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-10-24 12:29:22,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:22,290 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:29:22,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:29:22,291 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:22,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash -314217938, now seen corresponding path program 1 times [2024-10-24 12:29:22,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:22,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678381146] [2024-10-24 12:29:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678381146] [2024-10-24 12:29:22,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678381146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:29:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024282592] [2024-10-24 12:29:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:29:22,524 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) [2024-10-24 12:29:22,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:29:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:22,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 12:29:22,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:29:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:22,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:29:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:22,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024282592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:29:22,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:29:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-24 12:29:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681521845] [2024-10-24 12:29:22,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:29:22,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:29:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:29:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:29:22,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 68 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2024-10-24 12:29:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:23,031 INFO L124 PetriNetUnfolderBase]: 86/144 cut-off events. [2024-10-24 12:29:23,032 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 12:29:23,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 144 events. 86/144 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 283 event pairs, 22 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 293. Up to 67 conditions per place. [2024-10-24 12:29:23,035 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-10-24 12:29:23,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 180 flow [2024-10-24 12:29:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:29:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:29:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 65 transitions. [2024-10-24 12:29:23,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29017857142857145 [2024-10-24 12:29:23,038 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 68 flow. Second operand 8 states and 65 transitions. [2024-10-24 12:29:23,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 180 flow [2024-10-24 12:29:23,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 176 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 12:29:23,041 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 101 flow [2024-10-24 12:29:23,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=101, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-10-24 12:29:23,042 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2024-10-24 12:29:23,044 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 101 flow [2024-10-24 12:29:23,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2024-10-24 12:29:23,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:23,045 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] [2024-10-24 12:29:23,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:29:23,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:23,247 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:23,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1948261625, now seen corresponding path program 1 times [2024-10-24 12:29:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:23,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5925520] [2024-10-24 12:29:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:29:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5925520] [2024-10-24 12:29:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5925520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:29:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:29:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:29:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406776100] [2024-10-24 12:29:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:29:23,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:29:23,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:29:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:29:23,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:23,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-24 12:29:23,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:23,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:23,539 INFO L124 PetriNetUnfolderBase]: 171/284 cut-off events. [2024-10-24 12:29:23,539 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-24 12:29:23,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 284 events. 171/284 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 748 event pairs, 92 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 677. Up to 144 conditions per place. [2024-10-24 12:29:23,545 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 26 selfloop transitions, 3 changer transitions 24/54 dead transitions. [2024-10-24 12:29:23,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 296 flow [2024-10-24 12:29:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:29:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:29:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-10-24 12:29:23,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-10-24 12:29:23,547 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 101 flow. Second operand 5 states and 62 transitions. [2024-10-24 12:29:23,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 296 flow [2024-10-24 12:29:23,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 54 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:29:23,550 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 121 flow [2024-10-24 12:29:23,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-10-24 12:29:23,553 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2024-10-24 12:29:23,553 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 121 flow [2024-10-24 12:29:23,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-24 12:29:23,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:23,553 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] [2024-10-24 12:29:23,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:29:23,554 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:23,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash -778773361, now seen corresponding path program 1 times [2024-10-24 12:29:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980139903] [2024-10-24 12:29:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980139903] [2024-10-24 12:29:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980139903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:29:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957921114] [2024-10-24 12:29:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:23,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:29:23,720 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) [2024-10-24 12:29:23,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:29:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:23,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:29:23,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:29:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:23,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:29:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:29:23,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957921114] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:29:23,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:29:23,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2024-10-24 12:29:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875532887] [2024-10-24 12:29:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:29:23,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:29:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:29:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:29:23,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:23,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2024-10-24 12:29:23,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:23,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:23,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:24,046 INFO L124 PetriNetUnfolderBase]: 108/186 cut-off events. [2024-10-24 12:29:24,047 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-10-24 12:29:24,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 186 events. 108/186 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 389 event pairs, 46 based on Foata normal form. 14/180 useless extension candidates. Maximal degree in co-relation 463. Up to 146 conditions per place. [2024-10-24 12:29:24,050 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 33 selfloop transitions, 8 changer transitions 0/42 dead transitions. [2024-10-24 12:29:24,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 240 flow [2024-10-24 12:29:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:29:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:29:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-10-24 12:29:24,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-10-24 12:29:24,053 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 121 flow. Second operand 5 states and 52 transitions. [2024-10-24 12:29:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 240 flow [2024-10-24 12:29:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 225 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-24 12:29:24,057 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 166 flow [2024-10-24 12:29:24,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-10-24 12:29:24,060 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-10-24 12:29:24,060 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 166 flow [2024-10-24 12:29:24,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2024-10-24 12:29:24,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:24,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:29:24,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 12:29:24,261 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,SelfDestructingSolverStorable3 [2024-10-24 12:29:24,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:24,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 741960659, now seen corresponding path program 1 times [2024-10-24 12:29:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205221206] [2024-10-24 12:29:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 12:29:24,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259041966] [2024-10-24 12:29:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:24,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:29:24,343 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) [2024-10-24 12:29:24,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:29:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:24,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 12:29:24,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:29:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:29:24,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:29:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:29:24,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205221206] [2024-10-24 12:29:24,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 12:29:24,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259041966] [2024-10-24 12:29:24,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259041966] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:29:24,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 12:29:24,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-10-24 12:29:24,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103634449] [2024-10-24 12:29:24,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:29:24,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:29:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:29:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-24 12:29:24,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:24,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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) [2024-10-24 12:29:24,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:24,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:24,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:25,046 INFO L124 PetriNetUnfolderBase]: 176/305 cut-off events. [2024-10-24 12:29:25,048 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2024-10-24 12:29:25,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 305 events. 176/305 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 936 event pairs, 62 based on Foata normal form. 7/275 useless extension candidates. Maximal degree in co-relation 833. Up to 176 conditions per place. [2024-10-24 12:29:25,051 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 40 selfloop transitions, 6 changer transitions 16/63 dead transitions. [2024-10-24 12:29:25,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 417 flow [2024-10-24 12:29:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:29:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 12:29:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2024-10-24 12:29:25,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32589285714285715 [2024-10-24 12:29:25,054 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 166 flow. Second operand 8 states and 73 transitions. [2024-10-24 12:29:25,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 417 flow [2024-10-24 12:29:25,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 400 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-24 12:29:25,059 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 187 flow [2024-10-24 12:29:25,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-10-24 12:29:25,060 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-10-24 12:29:25,061 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 187 flow [2024-10-24 12:29:25,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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) [2024-10-24 12:29:25,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:25,062 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:29:25,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:29:25,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:25,263 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:25,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 432237020, now seen corresponding path program 1 times [2024-10-24 12:29:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020852811] [2024-10-24 12:29:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 12:29:25,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:29:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020852811] [2024-10-24 12:29:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020852811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:29:25,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:29:25,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:29:25,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132814699] [2024-10-24 12:29:25,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:29:25,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:29:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:29:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:29:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:29:25,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-24 12:29:25,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-10-24 12:29:25,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:29:25,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-24 12:29:25,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:29:25,595 INFO L124 PetriNetUnfolderBase]: 183/323 cut-off events. [2024-10-24 12:29:25,595 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-10-24 12:29:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 323 events. 183/323 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 906 event pairs, 93 based on Foata normal form. 19/323 useless extension candidates. Maximal degree in co-relation 723. Up to 228 conditions per place. [2024-10-24 12:29:25,599 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 29 selfloop transitions, 4 changer transitions 36/70 dead transitions. [2024-10-24 12:29:25,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 508 flow [2024-10-24 12:29:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:29:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:29:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-10-24 12:29:25,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-10-24 12:29:25,601 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 187 flow. Second operand 6 states and 71 transitions. [2024-10-24 12:29:25,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 508 flow [2024-10-24 12:29:25,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 469 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-10-24 12:29:25,607 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 172 flow [2024-10-24 12:29:25,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2024-10-24 12:29:25,609 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-10-24 12:29:25,610 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 172 flow [2024-10-24 12:29:25,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-10-24 12:29:25,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:29:25,610 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] [2024-10-24 12:29:25,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:29:25,611 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:29:25,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:29:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash 610220677, now seen corresponding path program 1 times [2024-10-24 12:29:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:29:25,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386750921] [2024-10-24 12:29:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:29:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 12:29:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518462316] [2024-10-24 12:29:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:29:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:29:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:29:25,693 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) [2024-10-24 12:29:25,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:29:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:29:25,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-24 12:29:25,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:29:25,875 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 [2024-10-24 12:29:25,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 12:29:25,918 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 [2024-10-24 12:29:26,063 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 11 treesize of output 7 [2024-10-24 12:29:26,078 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 [2024-10-24 12:29:26,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2024-10-24 12:29:26,496 INFO L349 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2024-10-24 12:29:26,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2024-10-24 12:29:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:29:26,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:29:43,899 INFO L349 Elim1Store]: treesize reduction 4, result has 97.4 percent of original size [2024-10-24 12:29:43,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3212 treesize of output 2511 [2024-10-24 12:29:55,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 985 treesize of output 931 [2024-10-24 12:29:55,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 931 treesize of output 901 [2024-10-24 12:29:56,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:29:56,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 1298 treesize of output 1577 [2024-10-24 12:29:57,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:29:57,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 1225 treesize of output 1576 [2024-10-24 12:29:59,278 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:04,596 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:11,348 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:19,416 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:23,099 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:34,320 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:38,507 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-24 12:30:49,482 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.