./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/unroll-3.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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:37:36,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:37:36,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:37:36,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:37:36,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:37:36,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:37:36,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:37:36,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:37:36,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:37:36,888 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:37:36,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:37:36,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:37:36,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:37:36,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:37:36,889 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:37:36,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:37:36,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:37:36,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:37:36,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:37:36,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:37:36,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:37:36,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:37:36,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:37:36,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:37:36,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:37:36,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:37:36,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:37:36,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:37:36,897 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:37:36,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:37:36,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:37:36,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:37:36,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:37:36,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:37:36,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:37:36,898 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:37:36,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:37:36,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:37:36,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:37:36,899 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:37:36,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:37:36,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:37:36,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-10 10:37:37,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:37:37,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:37:37,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:37:37,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:37:37,177 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:37:37,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-10 10:37:38,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:37:38,880 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:37:38,880 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-10 10:37:38,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8442e6067/fc66ac05a7864492aa8052c9ab98a4b3/FLAGd7ab661a4 [2024-11-10 10:37:38,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8442e6067/fc66ac05a7864492aa8052c9ab98a4b3 [2024-11-10 10:37:38,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:37:38,915 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:37:38,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:37:38,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:37:38,924 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:37:38,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:37:38" (1/1) ... [2024-11-10 10:37:38,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208d56ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:38, skipping insertion in model container [2024-11-10 10:37:38,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:37:38" (1/1) ... [2024-11-10 10:37:38,955 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:37:39,201 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/unroll-3.wvr.c[2526,2539] [2024-11-10 10:37:39,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:37:39,222 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:37:39,241 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/unroll-3.wvr.c[2526,2539] [2024-11-10 10:37:39,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:37:39,261 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:37:39,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39 WrapperNode [2024-11-10 10:37:39,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:37:39,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:37:39,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:37:39,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:37:39,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,301 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2024-11-10 10:37:39,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:37:39,304 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:37:39,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:37:39,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:37:39,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,333 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-10 10:37:39,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,338 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:37:39,344 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:37:39,344 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:37:39,344 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:37:39,345 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (1/1) ... [2024-11-10 10:37:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:37:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:39,382 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) [2024-11-10 10:37:39,385 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 [2024-11-10 10:37:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:37:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:37:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:37:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:37:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:37:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:37:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:37:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:37:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:37:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:37:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:37:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:37:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:37:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:37:39,433 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:37:39,542 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:37:39,544 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:37:39,829 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:37:39,831 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:37:40,061 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:37:40,061 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:37:40,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:37:40 BoogieIcfgContainer [2024-11-10 10:37:40,062 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:37:40,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:37:40,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:37:40,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:37:40,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:37:38" (1/3) ... [2024-11-10 10:37:40,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e62e320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:37:40, skipping insertion in model container [2024-11-10 10:37:40,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:37:39" (2/3) ... [2024-11-10 10:37:40,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e62e320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:37:40, skipping insertion in model container [2024-11-10 10:37:40,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:37:40" (3/3) ... [2024-11-10 10:37:40,073 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-10 10:37:40,087 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:37:40,087 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:37:40,088 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:37:40,138 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:37:40,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-11-10 10:37:40,221 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-11-10 10:37:40,221 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:37:40,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-10 10:37:40,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-11-10 10:37:40,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-11-10 10:37:40,238 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:37:40,245 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;@92e4732, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:37:40,245 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:37:40,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:37:40,264 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-11-10 10:37:40,264 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:37:40,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:40,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:40,266 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:40,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 879242447, now seen corresponding path program 1 times [2024-11-10 10:37:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:40,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460050633] [2024-11-10 10:37:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:40,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:40,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460050633] [2024-11-10 10:37:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460050633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:40,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:40,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:37:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419224784] [2024-11-10 10:37:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:40,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:37:40,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:37:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:37:40,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-10 10:37:40,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-10 10:37:40,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:40,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-10 10:37:40,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:40,645 INFO L124 PetriNetUnfolderBase]: 38/86 cut-off events. [2024-11-10 10:37:40,645 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 10:37:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 86 events. 38/86 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 22 based on Foata normal form. 16/98 useless extension candidates. Maximal degree in co-relation 134. Up to 70 conditions per place. [2024-11-10 10:37:40,649 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 16 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-10 10:37:40,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 90 flow [2024-11-10 10:37:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:37:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:37:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2024-11-10 10:37:40,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-10 10:37:40,662 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 2 states and 37 transitions. [2024-11-10 10:37:40,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 90 flow [2024-11-10 10:37:40,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 82 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:37:40,666 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-10 10:37:40,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-10 10:37:40,672 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-10 10:37:40,673 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-10 10:37:40,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-10 10:37:40,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:40,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:40,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:37:40,674 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:40,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1110227339, now seen corresponding path program 1 times [2024-11-10 10:37:40,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:40,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976070269] [2024-11-10 10:37:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:40,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976070269] [2024-11-10 10:37:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976070269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:40,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:40,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:37:40,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774530969] [2024-11-10 10:37:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:40,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:37:40,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:37:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:37:40,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-10 10:37:40,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-10 10:37:40,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:40,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-10 10:37:40,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:40,961 INFO L124 PetriNetUnfolderBase]: 69/161 cut-off events. [2024-11-10 10:37:40,961 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:37:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 161 events. 69/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 577 event pairs, 22 based on Foata normal form. 1/158 useless extension candidates. Maximal degree in co-relation 291. Up to 72 conditions per place. [2024-11-10 10:37:40,963 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 23 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-11-10 10:37:40,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 129 flow [2024-11-10 10:37:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:37:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:37:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-10 10:37:40,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-11-10 10:37:40,967 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 55 transitions. [2024-11-10 10:37:40,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 129 flow [2024-11-10 10:37:40,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:37:40,972 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 69 flow [2024-11-10 10:37:40,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2024-11-10 10:37:40,973 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-10 10:37:40,973 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 69 flow [2024-11-10 10:37:40,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-10 10:37:40,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:40,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:40,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:37:40,975 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:40,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 466561306, now seen corresponding path program 1 times [2024-11-10 10:37:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:40,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649728501] [2024-11-10 10:37:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649728501] [2024-11-10 10:37:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649728501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:41,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:37:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627161085] [2024-11-10 10:37:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:41,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:37:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:37:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:37:41,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-10 10:37:41,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-10 10:37:41,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:41,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-10 10:37:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:41,304 INFO L124 PetriNetUnfolderBase]: 69/157 cut-off events. [2024-11-10 10:37:41,304 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-10 10:37:41,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 157 events. 69/157 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 564 event pairs, 44 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 336. Up to 126 conditions per place. [2024-11-10 10:37:41,307 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 18 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-11-10 10:37:41,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 111 flow [2024-11-10 10:37:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:37:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:37:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-10 10:37:41,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-11-10 10:37:41,313 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 69 flow. Second operand 3 states and 43 transitions. [2024-11-10 10:37:41,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 111 flow [2024-11-10 10:37:41,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:37:41,315 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 78 flow [2024-11-10 10:37:41,315 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-10 10:37:41,316 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-10 10:37:41,317 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 78 flow [2024-11-10 10:37:41,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-10 10:37:41,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:41,318 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:41,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:37:41,318 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:41,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1449006363, now seen corresponding path program 1 times [2024-11-10 10:37:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313303761] [2024-11-10 10:37:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:41,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313303761] [2024-11-10 10:37:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313303761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262187045] [2024-11-10 10:37:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:41,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:41,566 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) [2024-11-10 10:37:41,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:37:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:41,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:37:41,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:41,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262187045] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:41,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:37:41,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-11-10 10:37:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985860154] [2024-11-10 10:37:41,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:41,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:37:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:41,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:37:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 10:37:41,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-10 10:37:41,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:41,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:41,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-10 10:37:41,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:42,031 INFO L124 PetriNetUnfolderBase]: 96/210 cut-off events. [2024-11-10 10:37:42,031 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-10 10:37:42,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 210 events. 96/210 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 30 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 435. Up to 90 conditions per place. [2024-11-10 10:37:42,035 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 30 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2024-11-10 10:37:42,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 186 flow [2024-11-10 10:37:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:37:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:37:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-10 10:37:42,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2024-11-10 10:37:42,038 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 78 flow. Second operand 4 states and 67 transitions. [2024-11-10 10:37:42,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 186 flow [2024-11-10 10:37:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:37:42,042 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 102 flow [2024-11-10 10:37:42,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-10 10:37:42,043 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-10 10:37:42,044 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 102 flow [2024-11-10 10:37:42,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:42,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:42,044 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:42,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:37:42,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:42,249 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:42,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1287211395, now seen corresponding path program 2 times [2024-11-10 10:37:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886436595] [2024-11-10 10:37:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:42,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886436595] [2024-11-10 10:37:42,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886436595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:42,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:42,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:37:42,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811260041] [2024-11-10 10:37:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:42,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:37:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:37:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:37:42,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-10 10:37:42,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:42,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:42,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-10 10:37:42,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:42,553 INFO L124 PetriNetUnfolderBase]: 168/351 cut-off events. [2024-11-10 10:37:42,553 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-11-10 10:37:42,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 351 events. 168/351 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1598 event pairs, 46 based on Foata normal form. 19/368 useless extension candidates. Maximal degree in co-relation 828. Up to 146 conditions per place. [2024-11-10 10:37:42,557 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 36 selfloop transitions, 7 changer transitions 12/60 dead transitions. [2024-11-10 10:37:42,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 60 transitions, 317 flow [2024-11-10 10:37:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:37:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:37:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-11-10 10:37:42,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-11-10 10:37:42,559 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 102 flow. Second operand 6 states and 94 transitions. [2024-11-10 10:37:42,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 60 transitions, 317 flow [2024-11-10 10:37:42,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:37:42,562 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 166 flow [2024-11-10 10:37:42,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-11-10 10:37:42,563 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2024-11-10 10:37:42,563 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 166 flow [2024-11-10 10:37:42,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:42,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:42,564 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:42,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:37:42,564 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:42,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -921802395, now seen corresponding path program 3 times [2024-11-10 10:37:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612585779] [2024-11-10 10:37:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:42,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:42,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612585779] [2024-11-10 10:37:42,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612585779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:42,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:42,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:37:42,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115729301] [2024-11-10 10:37:42,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:42,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:37:42,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:37:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:37:42,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-10 10:37:42,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2024-11-10 10:37:42,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:42,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-10 10:37:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:42,842 INFO L124 PetriNetUnfolderBase]: 135/318 cut-off events. [2024-11-10 10:37:42,842 INFO L125 PetriNetUnfolderBase]: For 525/532 co-relation queries the response was YES. [2024-11-10 10:37:42,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 318 events. 135/318 cut-off events. For 525/532 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1513 event pairs, 51 based on Foata normal form. 16/320 useless extension candidates. Maximal degree in co-relation 892. Up to 149 conditions per place. [2024-11-10 10:37:42,847 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 32 selfloop transitions, 8 changer transitions 6/53 dead transitions. [2024-11-10 10:37:42,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 332 flow [2024-11-10 10:37:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:37:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:37:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-10 10:37:42,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2024-11-10 10:37:42,850 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 166 flow. Second operand 5 states and 78 transitions. [2024-11-10 10:37:42,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 332 flow [2024-11-10 10:37:42,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 323 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 10:37:42,855 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 211 flow [2024-11-10 10:37:42,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-11-10 10:37:42,856 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2024-11-10 10:37:42,856 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 211 flow [2024-11-10 10:37:42,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2024-11-10 10:37:42,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:42,857 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:42,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:37:42,857 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:42,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1695176215, now seen corresponding path program 4 times [2024-11-10 10:37:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118431627] [2024-11-10 10:37:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:42,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118431627] [2024-11-10 10:37:42,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118431627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:42,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352638578] [2024-11-10 10:37:42,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:37:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:42,988 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) [2024-11-10 10:37:42,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:37:43,071 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:37:43,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:37:43,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:37:43,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:43,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:43,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352638578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:43,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:43,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2024-11-10 10:37:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453881625] [2024-11-10 10:37:43,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:43,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:37:43,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:37:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:37:43,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-10 10:37:43,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:43,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:43,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-10 10:37:43,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:43,371 INFO L124 PetriNetUnfolderBase]: 183/385 cut-off events. [2024-11-10 10:37:43,371 INFO L125 PetriNetUnfolderBase]: For 1201/1201 co-relation queries the response was YES. [2024-11-10 10:37:43,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 385 events. 183/385 cut-off events. For 1201/1201 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1731 event pairs, 62 based on Foata normal form. 7/390 useless extension candidates. Maximal degree in co-relation 1314. Up to 177 conditions per place. [2024-11-10 10:37:43,375 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 14 changer transitions 3/68 dead transitions. [2024-11-10 10:37:43,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 504 flow [2024-11-10 10:37:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:37:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:37:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-11-10 10:37:43,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-11-10 10:37:43,377 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 211 flow. Second operand 7 states and 105 transitions. [2024-11-10 10:37:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 504 flow [2024-11-10 10:37:43,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 484 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-10 10:37:43,382 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 288 flow [2024-11-10 10:37:43,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-11-10 10:37:43,383 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2024-11-10 10:37:43,383 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 288 flow [2024-11-10 10:37:43,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:37:43,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:43,384 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:43,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:37:43,587 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 [2024-11-10 10:37:43,588 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:43,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash 876265215, now seen corresponding path program 1 times [2024-11-10 10:37:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644399129] [2024-11-10 10:37:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644399129] [2024-11-10 10:37:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644399129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:43,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:37:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005600287] [2024-11-10 10:37:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:43,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:37:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:37:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:37:43,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-10 10:37:43,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:43,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:43,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-10 10:37:43,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:43,816 INFO L124 PetriNetUnfolderBase]: 153/340 cut-off events. [2024-11-10 10:37:43,818 INFO L125 PetriNetUnfolderBase]: For 1240/1256 co-relation queries the response was YES. [2024-11-10 10:37:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 340 events. 153/340 cut-off events. For 1240/1256 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1595 event pairs, 52 based on Foata normal form. 13/343 useless extension candidates. Maximal degree in co-relation 1203. Up to 209 conditions per place. [2024-11-10 10:37:43,822 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 34 selfloop transitions, 7 changer transitions 5/53 dead transitions. [2024-11-10 10:37:43,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 431 flow [2024-11-10 10:37:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:37:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:37:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-10 10:37:43,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-11-10 10:37:43,824 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 288 flow. Second operand 4 states and 66 transitions. [2024-11-10 10:37:43,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 431 flow [2024-11-10 10:37:43,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 414 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-10 10:37:43,829 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 316 flow [2024-11-10 10:37:43,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-11-10 10:37:43,831 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-11-10 10:37:43,832 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 316 flow [2024-11-10 10:37:43,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:43,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:43,833 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:43,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:37:43,834 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:43,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1940083633, now seen corresponding path program 2 times [2024-11-10 10:37:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855136201] [2024-11-10 10:37:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855136201] [2024-11-10 10:37:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855136201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:37:43,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:37:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:37:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029667534] [2024-11-10 10:37:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:37:43,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:37:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:37:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:37:43,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-10 10:37:43,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:43,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:43,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-10 10:37:43,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:44,018 INFO L124 PetriNetUnfolderBase]: 150/331 cut-off events. [2024-11-10 10:37:44,018 INFO L125 PetriNetUnfolderBase]: For 1412/1424 co-relation queries the response was YES. [2024-11-10 10:37:44,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 331 events. 150/331 cut-off events. For 1412/1424 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1513 event pairs, 63 based on Foata normal form. 11/334 useless extension candidates. Maximal degree in co-relation 1220. Up to 197 conditions per place. [2024-11-10 10:37:44,021 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 32 selfloop transitions, 11 changer transitions 4/54 dead transitions. [2024-11-10 10:37:44,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 458 flow [2024-11-10 10:37:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:37:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:37:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-10 10:37:44,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2024-11-10 10:37:44,023 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 316 flow. Second operand 4 states and 65 transitions. [2024-11-10 10:37:44,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 458 flow [2024-11-10 10:37:44,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 445 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-10 10:37:44,027 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 349 flow [2024-11-10 10:37:44,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=349, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-11-10 10:37:44,028 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2024-11-10 10:37:44,028 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 349 flow [2024-11-10 10:37:44,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-11-10 10:37:44,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:44,029 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:44,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:37:44,029 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:44,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2077189213, now seen corresponding path program 5 times [2024-11-10 10:37:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834126624] [2024-11-10 10:37:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:44,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834126624] [2024-11-10 10:37:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834126624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723260466] [2024-11-10 10:37:44,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:37:44,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:44,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:44,142 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) [2024-11-10 10:37:44,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:37:44,233 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:37:44,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:37:44,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:37:44,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:44,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723260466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:44,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-10 10:37:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041763118] [2024-11-10 10:37:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:44,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:37:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:37:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:37:44,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-10 10:37:44,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 349 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-10 10:37:44,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:44,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-10 10:37:44,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:44,460 INFO L124 PetriNetUnfolderBase]: 147/299 cut-off events. [2024-11-10 10:37:44,460 INFO L125 PetriNetUnfolderBase]: For 1631/1631 co-relation queries the response was YES. [2024-11-10 10:37:44,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 299 events. 147/299 cut-off events. For 1631/1631 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1210 event pairs, 52 based on Foata normal form. 7/303 useless extension candidates. Maximal degree in co-relation 1229. Up to 189 conditions per place. [2024-11-10 10:37:44,463 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 34 selfloop transitions, 14 changer transitions 4/57 dead transitions. [2024-11-10 10:37:44,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 523 flow [2024-11-10 10:37:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:37:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:37:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-10 10:37:44,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-11-10 10:37:44,464 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 349 flow. Second operand 5 states and 74 transitions. [2024-11-10 10:37:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 523 flow [2024-11-10 10:37:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 506 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 10:37:44,468 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 369 flow [2024-11-10 10:37:44,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2024-11-10 10:37:44,469 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2024-11-10 10:37:44,469 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 369 flow [2024-11-10 10:37:44,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-10 10:37:44,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:44,469 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:44,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 10:37:44,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:44,670 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:44,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1159833020, now seen corresponding path program 1 times [2024-11-10 10:37:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:44,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527873347] [2024-11-10 10:37:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:37:44,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:44,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527873347] [2024-11-10 10:37:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527873347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:44,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324799610] [2024-11-10 10:37:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:44,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:44,978 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) [2024-11-10 10:37:44,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:37:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:45,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-10 10:37:45,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:45,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 10:37:45,297 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-10 10:37:45,298 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2024-11-10 10:37:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:45,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:45,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 116 [2024-11-10 10:37:45,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:37:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 564 treesize of output 480 [2024-11-10 10:38:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324799610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:38:15,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:38:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 18 [2024-11-10 10:38:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45397432] [2024-11-10 10:38:15,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:38:15,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:38:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:38:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:38:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:38:15,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-10 10:38:15,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 369 flow. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 18 states have internal predecessors, (159), 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) [2024-11-10 10:38:15,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:38:15,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-10 10:38:15,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:38:17,275 INFO L124 PetriNetUnfolderBase]: 477/972 cut-off events. [2024-11-10 10:38:17,276 INFO L125 PetriNetUnfolderBase]: For 5289/5293 co-relation queries the response was YES. [2024-11-10 10:38:17,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3970 conditions, 972 events. 477/972 cut-off events. For 5289/5293 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5390 event pairs, 37 based on Foata normal form. 16/986 useless extension candidates. Maximal degree in co-relation 3951. Up to 313 conditions per place. [2024-11-10 10:38:17,283 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 66 selfloop transitions, 27 changer transitions 96/193 dead transitions. [2024-11-10 10:38:17,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 193 transitions, 1728 flow [2024-11-10 10:38:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 10:38:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 10:38:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 336 transitions. [2024-11-10 10:38:17,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3995243757431629 [2024-11-10 10:38:17,286 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 369 flow. Second operand 29 states and 336 transitions. [2024-11-10 10:38:17,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 193 transitions, 1728 flow [2024-11-10 10:38:17,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1572 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-11-10 10:38:17,297 INFO L231 Difference]: Finished difference. Result has 94 places, 55 transitions, 562 flow [2024-11-10 10:38:17,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=562, PETRI_PLACES=94, PETRI_TRANSITIONS=55} [2024-11-10 10:38:17,298 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2024-11-10 10:38:17,298 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 55 transitions, 562 flow [2024-11-10 10:38:17,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 18 states have internal predecessors, (159), 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) [2024-11-10 10:38:17,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:38:17,299 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:38:17,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:38:17,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:17,499 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:38:17,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:38:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1177274087, now seen corresponding path program 2 times [2024-11-10 10:38:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:38:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104913898] [2024-11-10 10:38:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:38:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:38:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:38:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:38:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:38:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104913898] [2024-11-10 10:38:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104913898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:38:17,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42243893] [2024-11-10 10:38:17,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:38:17,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:38:17,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:38:17,959 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) [2024-11-10 10:38:17,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:38:18,075 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:38:18,075 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:38:18,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 10:38:18,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:38:18,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 10:38:18,359 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-10 10:38:18,359 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-10 10:38:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:38:18,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:38:18,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2024-11-10 10:38:18,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:38:18,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 610 treesize of output 514