./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:29:31,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:29:31,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:29:31,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:29:31,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:29:31,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:29:31,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:29:31,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:29:31,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:29:31,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:29:31,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:29:31,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:29:31,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:29:31,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:29:31,262 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:29:31,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:29:31,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:29:31,263 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:29:31,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:29:31,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:29:31,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:29:31,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:29:31,265 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:29:31,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:29:31,265 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:29:31,266 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:29:31,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:29:31,266 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:29:31,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:29:31,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:29:31,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:29:31,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:29:31,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:29:31,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:29:31,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:29:31,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:29:31,270 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:29:31,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:29:31,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:29:31,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:29:31,271 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:29:31,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:29:31,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-11-12 08:29:31,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:29:31,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:29:31,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:29:31,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:29:31,543 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:29:31,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-12 08:29:32,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:29:33,192 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:29:33,193 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-12 08:29:33,201 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4cc9eb9/e54f129b30844ad1b46a1843448e463f/FLAGdb355dc2a [2024-11-12 08:29:33,565 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4cc9eb9/e54f129b30844ad1b46a1843448e463f [2024-11-12 08:29:33,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:29:33,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:29:33,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:29:33,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:29:33,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:29:33,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a552ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33, skipping insertion in model container [2024-11-12 08:29:33,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,605 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:29:33,814 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-two-queue.wvr.c[3013,3026] [2024-11-12 08:29:33,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:29:33,833 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:29:33,853 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-two-queue.wvr.c[3013,3026] [2024-11-12 08:29:33,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:29:33,877 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:29:33,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33 WrapperNode [2024-11-12 08:29:33,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:29:33,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:29:33,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:29:33,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:29:33,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,920 INFO L138 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2024-11-12 08:29:33,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:29:33,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:29:33,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:29:33,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:29:33,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,952 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-12 08:29:33,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,983 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,985 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:29:33,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:29:33,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:29:33,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:29:33,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (1/1) ... [2024-11-12 08:29:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:29:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:34,025 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) [2024-11-12 08:29:34,028 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 [2024-11-12 08:29:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:29:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:29:34,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:29:34,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:29:34,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:29:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:29:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:29:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:29:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:29:34,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 08:29:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 08:29:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:29:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:29:34,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:29:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:29:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:29:34,092 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:29:34,221 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:29:34,224 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:29:34,594 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:29:34,595 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:29:34,875 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:29:34,875 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 08:29:34,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:29:34 BoogieIcfgContainer [2024-11-12 08:29:34,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:29:34,880 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:29:34,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:29:34,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:29:34,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:29:33" (1/3) ... [2024-11-12 08:29:34,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a546102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:29:34, skipping insertion in model container [2024-11-12 08:29:34,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:29:33" (2/3) ... [2024-11-12 08:29:34,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a546102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:29:34, skipping insertion in model container [2024-11-12 08:29:34,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:29:34" (3/3) ... [2024-11-12 08:29:34,888 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-11-12 08:29:34,904 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:29:34,905 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:29:34,905 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:29:34,951 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:29:34,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-11-12 08:29:35,016 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-12 08:29:35,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:29:35,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-12 08:29:35,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-11-12 08:29:35,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-11-12 08:29:35,037 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:29:35,045 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;@6b25088d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:29:35,045 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:29:35,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:29:35,058 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-12 08:29:35,058 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:29:35,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:35,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:29:35,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:35,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash 439888984, now seen corresponding path program 1 times [2024-11-12 08:29:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:35,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390106434] [2024-11-12 08:29:35,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:35,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:35,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390106434] [2024-11-12 08:29:35,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390106434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:35,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:29:35,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:29:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979404003] [2024-11-12 08:29:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:35,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:29:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:29:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:29:35,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-12 08:29:35,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-12 08:29:35,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:35,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-12 08:29:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:35,731 INFO L124 PetriNetUnfolderBase]: 141/263 cut-off events. [2024-11-12 08:29:35,731 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-12 08:29:35,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 263 events. 141/263 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 26 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 458. Up to 181 conditions per place. [2024-11-12 08:29:35,767 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 27 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2024-11-12 08:29:35,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 155 flow [2024-11-12 08:29:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:29:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:29:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-11-12 08:29:35,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-12 08:29:35,798 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-11-12 08:29:35,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 155 flow [2024-11-12 08:29:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:29:35,802 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 73 flow [2024-11-12 08:29:35,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-12 08:29:35,807 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-11-12 08:29:35,807 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 73 flow [2024-11-12 08:29:35,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-11-12 08:29:35,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:35,808 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:29:35,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:29:35,809 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:35,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash -169688755, now seen corresponding path program 1 times [2024-11-12 08:29:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:35,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457147717] [2024-11-12 08:29:35,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:35,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457147717] [2024-11-12 08:29:35,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457147717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:35,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:29:35,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:29:35,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242162761] [2024-11-12 08:29:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:35,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:29:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:29:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:29:35,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-12 08:29:35,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 08:29:35,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:35,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-12 08:29:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:36,044 INFO L124 PetriNetUnfolderBase]: 105/206 cut-off events. [2024-11-12 08:29:36,045 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-12 08:29:36,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 206 events. 105/206 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 729 event pairs, 22 based on Foata normal form. 6/206 useless extension candidates. Maximal degree in co-relation 120. Up to 143 conditions per place. [2024-11-12 08:29:36,047 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 25 selfloop transitions, 2 changer transitions 2/34 dead transitions. [2024-11-12 08:29:36,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 147 flow [2024-11-12 08:29:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:29:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:29:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-12 08:29:36,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-12 08:29:36,050 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 73 flow. Second operand 3 states and 49 transitions. [2024-11-12 08:29:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 147 flow [2024-11-12 08:29:36,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:29:36,051 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 82 flow [2024-11-12 08:29:36,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-11-12 08:29:36,052 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-11-12 08:29:36,052 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 82 flow [2024-11-12 08:29:36,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 08:29:36,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:36,053 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:29:36,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:29:36,057 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:36,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1033703689, now seen corresponding path program 1 times [2024-11-12 08:29:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926287301] [2024-11-12 08:29:36,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926287301] [2024-11-12 08:29:36,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926287301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:36,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:29:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:29:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208782307] [2024-11-12 08:29:36,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:36,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:29:36,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:29:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:29:36,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-12 08:29:36,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 08:29:36,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:36,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-12 08:29:36,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:36,258 INFO L124 PetriNetUnfolderBase]: 80/168 cut-off events. [2024-11-12 08:29:36,259 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-12 08:29:36,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 168 events. 80/168 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 27 based on Foata normal form. 5/168 useless extension candidates. Maximal degree in co-relation 248. Up to 112 conditions per place. [2024-11-12 08:29:36,262 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 26 selfloop transitions, 2 changer transitions 4/37 dead transitions. [2024-11-12 08:29:36,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 37 transitions, 170 flow [2024-11-12 08:29:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:29:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:29:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-12 08:29:36,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-12 08:29:36,265 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 82 flow. Second operand 3 states and 51 transitions. [2024-11-12 08:29:36,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 37 transitions, 170 flow [2024-11-12 08:29:36,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:29:36,268 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 92 flow [2024-11-12 08:29:36,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-12 08:29:36,271 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2024-11-12 08:29:36,271 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 92 flow [2024-11-12 08:29:36,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 08:29:36,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:36,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:29:36,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 08:29:36,272 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:36,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1248587000, now seen corresponding path program 1 times [2024-11-12 08:29:36,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:36,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589588317] [2024-11-12 08:29:36,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:36,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:36,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589588317] [2024-11-12 08:29:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589588317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:36,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:29:36,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:29:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000997040] [2024-11-12 08:29:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:36,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:29:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:29:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:29:36,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-12 08:29:36,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-12 08:29:36,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:36,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-12 08:29:36,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:36,548 INFO L124 PetriNetUnfolderBase]: 95/216 cut-off events. [2024-11-12 08:29:36,548 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-12 08:29:36,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 216 events. 95/216 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 824 event pairs, 67 based on Foata normal form. 4/211 useless extension candidates. Maximal degree in co-relation 266. Up to 150 conditions per place. [2024-11-12 08:29:36,551 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 23 selfloop transitions, 2 changer transitions 12/42 dead transitions. [2024-11-12 08:29:36,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 42 transitions, 199 flow [2024-11-12 08:29:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:29:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:29:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-12 08:29:36,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-11-12 08:29:36,555 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 92 flow. Second operand 4 states and 62 transitions. [2024-11-12 08:29:36,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 42 transitions, 199 flow [2024-11-12 08:29:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:29:36,558 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 104 flow [2024-11-12 08:29:36,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-12 08:29:36,560 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-11-12 08:29:36,561 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 104 flow [2024-11-12 08:29:36,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-12 08:29:36,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:36,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:29:36,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:29:36,562 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:36,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash -739851490, now seen corresponding path program 1 times [2024-11-12 08:29:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:36,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391517432] [2024-11-12 08:29:36,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:29:36,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:36,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391517432] [2024-11-12 08:29:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391517432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:29:36,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:29:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687146223] [2024-11-12 08:29:36,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:36,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:29:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:29:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:29:36,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-12 08:29:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-12 08:29:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:36,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-12 08:29:36,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:36,795 INFO L124 PetriNetUnfolderBase]: 93/211 cut-off events. [2024-11-12 08:29:36,796 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-12 08:29:36,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 93/211 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 769 event pairs, 66 based on Foata normal form. 7/209 useless extension candidates. Maximal degree in co-relation 476. Up to 151 conditions per place. [2024-11-12 08:29:36,798 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 24 selfloop transitions, 2 changer transitions 10/41 dead transitions. [2024-11-12 08:29:36,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 206 flow [2024-11-12 08:29:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:29:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:29:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-12 08:29:36,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-12 08:29:36,801 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 104 flow. Second operand 4 states and 60 transitions. [2024-11-12 08:29:36,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 206 flow [2024-11-12 08:29:36,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-12 08:29:36,803 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 112 flow [2024-11-12 08:29:36,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-12 08:29:36,804 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-11-12 08:29:36,804 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 112 flow [2024-11-12 08:29:36,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-12 08:29:36,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:36,806 INFO L206 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] [2024-11-12 08:29:36,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 08:29:36,809 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:36,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash 271940661, now seen corresponding path program 1 times [2024-11-12 08:29:36,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:36,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679616933] [2024-11-12 08:29:36,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:38,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679616933] [2024-11-12 08:29:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679616933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:29:38,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354558348] [2024-11-12 08:29:38,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:38,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:38,670 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) [2024-11-12 08:29:38,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:29:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:38,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-12 08:29:38,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:29:38,936 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 23 treesize of output 1 [2024-11-12 08:29:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:29:39,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:29:40,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:40,284 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 147 treesize of output 145 [2024-11-12 08:29:40,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:40,352 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 33 treesize of output 29 [2024-11-12 08:29:40,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:40,409 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 51 treesize of output 47 [2024-11-12 08:29:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:29:40,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354558348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:29:40,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:29:40,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 34 [2024-11-12 08:29:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522858776] [2024-11-12 08:29:40,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:29:40,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-12 08:29:40,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-12 08:29:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 08:29:40,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:29:40,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 112 flow. Second operand has 35 states, 35 states have (on average 6.828571428571428) internal successors, (239), 35 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:29:40,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:40,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:29:40,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:46,094 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] [2024-11-12 08:29:50,111 INFO L124 PetriNetUnfolderBase]: 721/1344 cut-off events. [2024-11-12 08:29:50,111 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-11-12 08:29:50,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1344 events. 721/1344 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7165 event pairs, 120 based on Foata normal form. 63/1182 useless extension candidates. Maximal degree in co-relation 2265. Up to 247 conditions per place. [2024-11-12 08:29:50,124 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 139 selfloop transitions, 102 changer transitions 83/327 dead transitions. [2024-11-12 08:29:50,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 327 transitions, 1603 flow [2024-11-12 08:29:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-12 08:29:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-11-12 08:29:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 631 transitions. [2024-11-12 08:29:50,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38196125907990314 [2024-11-12 08:29:50,134 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 112 flow. Second operand 59 states and 631 transitions. [2024-11-12 08:29:50,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 327 transitions, 1603 flow [2024-11-12 08:29:50,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 327 transitions, 1583 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-12 08:29:50,147 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 864 flow [2024-11-12 08:29:50,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=864, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-11-12 08:29:50,148 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2024-11-12 08:29:50,148 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 864 flow [2024-11-12 08:29:50,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.828571428571428) internal successors, (239), 35 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:29:50,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:50,149 INFO L206 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] [2024-11-12 08:29:50,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 08:29:50,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 08:29:50,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:50,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1047197763, now seen corresponding path program 2 times [2024-11-12 08:29:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502602987] [2024-11-12 08:29:50,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:50,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:51,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502602987] [2024-11-12 08:29:51,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502602987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:29:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796151709] [2024-11-12 08:29:51,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:29:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:51,568 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) [2024-11-12 08:29:51,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:29:51,650 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 08:29:51,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:29:51,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 08:29:51,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:29:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:29:52,082 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:29:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796151709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:52,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:29:52,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 24 [2024-11-12 08:29:52,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407332621] [2024-11-12 08:29:52,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:52,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 08:29:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:52,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 08:29:52,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-12 08:29:52,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:29:52,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 864 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:29:52,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:52,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:29:52,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:52,531 INFO L124 PetriNetUnfolderBase]: 692/1309 cut-off events. [2024-11-12 08:29:52,532 INFO L125 PetriNetUnfolderBase]: For 4772/4772 co-relation queries the response was YES. [2024-11-12 08:29:52,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 1309 events. 692/1309 cut-off events. For 4772/4772 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6927 event pairs, 162 based on Foata normal form. 26/1332 useless extension candidates. Maximal degree in co-relation 4644. Up to 861 conditions per place. [2024-11-12 08:29:52,545 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 118 selfloop transitions, 59 changer transitions 9/189 dead transitions. [2024-11-12 08:29:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 1522 flow [2024-11-12 08:29:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:29:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:29:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-11-12 08:29:52,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-12 08:29:52,547 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 864 flow. Second operand 11 states and 133 transitions. [2024-11-12 08:29:52,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 1522 flow [2024-11-12 08:29:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 189 transitions, 1351 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-11-12 08:29:52,576 INFO L231 Difference]: Finished difference. Result has 113 places, 158 transitions, 1059 flow [2024-11-12 08:29:52,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1059, PETRI_PLACES=113, PETRI_TRANSITIONS=158} [2024-11-12 08:29:52,577 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 85 predicate places. [2024-11-12 08:29:52,577 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 158 transitions, 1059 flow [2024-11-12 08:29:52,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:29:52,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:52,578 INFO L206 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] [2024-11-12 08:29:52,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:29:52,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-12 08:29:52,780 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:52,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1289487329, now seen corresponding path program 3 times [2024-11-12 08:29:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336916924] [2024-11-12 08:29:52,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336916924] [2024-11-12 08:29:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336916924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:29:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910813905] [2024-11-12 08:29:54,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:29:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:54,214 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) [2024-11-12 08:29:54,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:29:54,310 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-12 08:29:54,310 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:29:54,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 08:29:54,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:29:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:29:54,680 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:29:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910813905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:29:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:29:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 24 [2024-11-12 08:29:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187959401] [2024-11-12 08:29:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:29:54,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 08:29:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 08:29:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-11-12 08:29:54,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:29:54,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 158 transitions, 1059 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:29:54,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:54,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:29:54,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:29:55,243 INFO L124 PetriNetUnfolderBase]: 871/1622 cut-off events. [2024-11-12 08:29:55,243 INFO L125 PetriNetUnfolderBase]: For 7368/7368 co-relation queries the response was YES. [2024-11-12 08:29:55,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7189 conditions, 1622 events. 871/1622 cut-off events. For 7368/7368 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8959 event pairs, 138 based on Foata normal form. 2/1623 useless extension candidates. Maximal degree in co-relation 6928. Up to 997 conditions per place. [2024-11-12 08:29:55,260 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 143 selfloop transitions, 72 changer transitions 7/225 dead transitions. [2024-11-12 08:29:55,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 225 transitions, 1902 flow [2024-11-12 08:29:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 08:29:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 08:29:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-11-12 08:29:55,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-12 08:29:55,262 INFO L175 Difference]: Start difference. First operand has 113 places, 158 transitions, 1059 flow. Second operand 10 states and 126 transitions. [2024-11-12 08:29:55,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 225 transitions, 1902 flow [2024-11-12 08:29:55,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 225 transitions, 1844 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-12 08:29:55,296 INFO L231 Difference]: Finished difference. Result has 125 places, 186 transitions, 1453 flow [2024-11-12 08:29:55,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1453, PETRI_PLACES=125, PETRI_TRANSITIONS=186} [2024-11-12 08:29:55,297 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-11-12 08:29:55,298 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 186 transitions, 1453 flow [2024-11-12 08:29:55,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:29:55,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:29:55,298 INFO L206 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] [2024-11-12 08:29:55,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:29:55,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:55,499 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:29:55,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:29:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash 671145943, now seen corresponding path program 4 times [2024-11-12 08:29:55,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:29:55,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755918707] [2024-11-12 08:29:55,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:29:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:29:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:29:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:29:56,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:29:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755918707] [2024-11-12 08:29:56,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755918707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:29:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581031586] [2024-11-12 08:29:56,580 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:29:56,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:29:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:29:56,582 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) [2024-11-12 08:29:56,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:29:56,661 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:29:56,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:29:56,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-12 08:29:56,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:29:56,729 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 23 treesize of output 1 [2024-11-12 08:29:56,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:56,988 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 50 treesize of output 34 [2024-11-12 08:29:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:29:57,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:29:57,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:57,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-11-12 08:29:58,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:58,335 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 28 treesize of output 24 [2024-11-12 08:29:58,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:58,368 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 35 treesize of output 31 [2024-11-12 08:29:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:29:58,388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-12 08:29:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:29:58,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-12 08:29:58,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:29:58,571 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 103 treesize of output 81 [2024-11-12 08:29:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:29:58,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581031586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:29:58,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:29:58,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-11-12 08:29:58,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439682941] [2024-11-12 08:29:58,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:29:58,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-12 08:29:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:29:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-12 08:29:58,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2024-11-12 08:29:58,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:29:58,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 186 transitions, 1453 flow. Second operand has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-11-12 08:29:58,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:29:58,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:29:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:30:13,375 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] [2024-11-12 08:30:15,686 INFO L124 PetriNetUnfolderBase]: 1252/2322 cut-off events. [2024-11-12 08:30:15,686 INFO L125 PetriNetUnfolderBase]: For 9414/9414 co-relation queries the response was YES. [2024-11-12 08:30:15,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10259 conditions, 2322 events. 1252/2322 cut-off events. For 9414/9414 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13810 event pairs, 79 based on Foata normal form. 30/2351 useless extension candidates. Maximal degree in co-relation 9730. Up to 456 conditions per place. [2024-11-12 08:30:15,708 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 169 selfloop transitions, 259 changer transitions 93/524 dead transitions. [2024-11-12 08:30:15,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 524 transitions, 4558 flow [2024-11-12 08:30:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-12 08:30:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-12 08:30:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 740 transitions. [2024-11-12 08:30:15,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3432282003710575 [2024-11-12 08:30:15,712 INFO L175 Difference]: Start difference. First operand has 125 places, 186 transitions, 1453 flow. Second operand 77 states and 740 transitions. [2024-11-12 08:30:15,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 524 transitions, 4558 flow [2024-11-12 08:30:15,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 524 transitions, 4407 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-11-12 08:30:15,765 INFO L231 Difference]: Finished difference. Result has 219 places, 316 transitions, 3350 flow [2024-11-12 08:30:15,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=3350, PETRI_PLACES=219, PETRI_TRANSITIONS=316} [2024-11-12 08:30:15,770 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 191 predicate places. [2024-11-12 08:30:15,771 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 316 transitions, 3350 flow [2024-11-12 08:30:15,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-11-12 08:30:15,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:30:15,771 INFO L206 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] [2024-11-12 08:30:15,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:30:15,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:30:15,978 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:30:15,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:30:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -285813791, now seen corresponding path program 5 times [2024-11-12 08:30:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:30:15,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003363322] [2024-11-12 08:30:15,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:30:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:30:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:30:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:30:17,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:30:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003363322] [2024-11-12 08:30:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003363322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:30:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574530555] [2024-11-12 08:30:17,048 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:30:17,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:30:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:30:17,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:30:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:30:17,137 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:30:17,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:30:17,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 08:30:17,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:30:17,150 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 [2024-11-12 08:30:17,216 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 23 treesize of output 1 [2024-11-12 08:30:17,262 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 08:30:17,262 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 [2024-11-12 08:30:17,300 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 8 treesize of output 1 [2024-11-12 08:30:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:30:17,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:30:18,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:30:18,092 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 68 [2024-11-12 08:30:18,155 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-12 08:30:18,156 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 162 treesize of output 202 [2024-11-12 08:30:18,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:30:18,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 114 treesize of output 158 [2024-11-12 08:30:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:30:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574530555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:30:21,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:30:21,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 10] total 33 [2024-11-12 08:30:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452928093] [2024-11-12 08:30:21,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:30:21,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-12 08:30:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:30:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-12 08:30:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=991, Unknown=2, NotChecked=0, Total=1122 [2024-11-12 08:30:21,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:30:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 316 transitions, 3350 flow. Second operand has 34 states, 34 states have (on average 6.852941176470588) internal successors, (233), 34 states have internal predecessors, (233), 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) [2024-11-12 08:30:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:30:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:30:21,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:30:25,893 INFO L124 PetriNetUnfolderBase]: 1938/3601 cut-off events. [2024-11-12 08:30:25,894 INFO L125 PetriNetUnfolderBase]: For 33014/33014 co-relation queries the response was YES. [2024-11-12 08:30:25,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21046 conditions, 3601 events. 1938/3601 cut-off events. For 33014/33014 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23697 event pairs, 148 based on Foata normal form. 5/3604 useless extension candidates. Maximal degree in co-relation 20280. Up to 1862 conditions per place. [2024-11-12 08:30:25,942 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 434 selfloop transitions, 236 changer transitions 21/694 dead transitions. [2024-11-12 08:30:25,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 694 transitions, 8707 flow [2024-11-12 08:30:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-12 08:30:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-12 08:30:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 486 transitions. [2024-11-12 08:30:25,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36930091185410335 [2024-11-12 08:30:25,945 INFO L175 Difference]: Start difference. First operand has 219 places, 316 transitions, 3350 flow. Second operand 47 states and 486 transitions. [2024-11-12 08:30:25,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 694 transitions, 8707 flow [2024-11-12 08:30:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 694 transitions, 7719 flow, removed 359 selfloop flow, removed 35 redundant places. [2024-11-12 08:30:26,172 INFO L231 Difference]: Finished difference. Result has 245 places, 480 transitions, 5595 flow [2024-11-12 08:30:26,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5595, PETRI_PLACES=245, PETRI_TRANSITIONS=480} [2024-11-12 08:30:26,173 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 217 predicate places. [2024-11-12 08:30:26,174 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 480 transitions, 5595 flow [2024-11-12 08:30:26,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.852941176470588) internal successors, (233), 34 states have internal predecessors, (233), 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) [2024-11-12 08:30:26,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:30:26,175 INFO L206 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] [2024-11-12 08:30:26,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:30:26,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 08:30:26,377 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:30:26,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:30:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2110720971, now seen corresponding path program 6 times [2024-11-12 08:30:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:30:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575587203] [2024-11-12 08:30:26,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:30:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:30:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:30:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:30:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:30:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575587203] [2024-11-12 08:30:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575587203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:30:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327346816] [2024-11-12 08:30:27,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:30:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:30:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:30:27,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:30:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:30:27,570 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-12 08:30:27,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:30:27,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 08:30:27,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:30:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:30:27,916 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 08:30:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327346816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:30:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 08:30:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 24 [2024-11-12 08:30:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983334780] [2024-11-12 08:30:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:30:27,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 08:30:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:30:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 08:30:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-12 08:30:27,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:30:27,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 480 transitions, 5595 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:30:27,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:30:27,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:30:27,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:30:28,923 INFO L124 PetriNetUnfolderBase]: 2063/3856 cut-off events. [2024-11-12 08:30:28,923 INFO L125 PetriNetUnfolderBase]: For 31504/31504 co-relation queries the response was YES. [2024-11-12 08:30:28,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21868 conditions, 3856 events. 2063/3856 cut-off events. For 31504/31504 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26103 event pairs, 162 based on Foata normal form. 2/3858 useless extension candidates. Maximal degree in co-relation 21647. Up to 3072 conditions per place. [2024-11-12 08:30:28,967 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 402 selfloop transitions, 135 changer transitions 8/548 dead transitions. [2024-11-12 08:30:28,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 548 transitions, 7376 flow [2024-11-12 08:30:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:30:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:30:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-11-12 08:30:28,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-11-12 08:30:28,969 INFO L175 Difference]: Start difference. First operand has 245 places, 480 transitions, 5595 flow. Second operand 11 states and 139 transitions. [2024-11-12 08:30:28,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 548 transitions, 7376 flow [2024-11-12 08:30:29,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 548 transitions, 6937 flow, removed 163 selfloop flow, removed 18 redundant places. [2024-11-12 08:30:29,208 INFO L231 Difference]: Finished difference. Result has 240 places, 497 transitions, 5810 flow [2024-11-12 08:30:29,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5187, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5810, PETRI_PLACES=240, PETRI_TRANSITIONS=497} [2024-11-12 08:30:29,211 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 212 predicate places. [2024-11-12 08:30:29,211 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 497 transitions, 5810 flow [2024-11-12 08:30:29,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-11-12 08:30:29,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:30:29,212 INFO L206 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] [2024-11-12 08:30:29,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:30:29,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:30:29,413 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:30:29,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:30:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash 946463583, now seen corresponding path program 7 times [2024-11-12 08:30:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:30:29,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984890239] [2024-11-12 08:30:29,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:30:29,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:30:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:30:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:30:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:30:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984890239] [2024-11-12 08:30:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984890239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:30:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104936551] [2024-11-12 08:30:30,553 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:30:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:30:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:30:30,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:30:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:30:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:30:30,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-12 08:30:30,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:30:30,751 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 23 treesize of output 1 [2024-11-12 08:30:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:30:31,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:30:32,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:30:32,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-11-12 08:30:33,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:30:33,276 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 35 treesize of output 31 [2024-11-12 08:30:33,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,293 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-12 08:30:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,305 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-12 08:30:33,323 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-12 08:30:33,324 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 35 treesize of output 1 [2024-11-12 08:30:33,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-12 08:30:33,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,650 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-12 08:30:33,671 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-12 08:30:33,671 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 35 treesize of output 1 [2024-11-12 08:30:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-12 08:30:33,699 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 08:30:33,700 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 22 treesize of output 14 [2024-11-12 08:30:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,711 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-12 08:30:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,720 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-12 08:30:33,766 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-12 08:30:33,766 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 22 treesize of output 1 [2024-11-12 08:30:33,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 08:30:33,775 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-12 08:30:33,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:30:33,898 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 101 treesize of output 85 [2024-11-12 08:30:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:30:34,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104936551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:30:34,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:30:34,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-11-12 08:30:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016132307] [2024-11-12 08:30:34,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:30:34,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-12 08:30:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:30:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-12 08:30:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2024-11-12 08:30:34,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-12 08:30:34,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 497 transitions, 5810 flow. Second operand has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 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) [2024-11-12 08:30:34,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:30:34,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-12 08:30:34,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:30:39,911 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 [0, 1] [2024-11-12 08:30:43,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-12 08:30:50,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-12 08:30:54,271 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 [0, 1]