./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:46:49,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:46:49,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:46:49,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:46:49,068 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:46:49,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:46:49,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:46:49,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:46:49,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:46:49,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:46:49,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:46:49,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:46:49,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:46:49,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:46:49,089 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:46:49,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:46:49,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:46:49,090 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:46:49,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:46:49,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:46:49,094 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:46:49,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:46:49,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:46:49,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:46:49,096 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:46:49,096 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:46:49,096 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:46:49,096 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:46:49,097 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:46:49,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:46:49,098 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:46:49,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:46:49,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:46:49,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:46:49,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:46:49,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:46:49,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:46:49,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:46:49,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:46:49,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:46:49,100 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:46:49,100 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:46:49,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:46:49,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-06-27 16:46:49,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:46:49,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:46:49,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:46:49,323 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:46:49,323 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:46:49,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 16:46:50,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:46:50,431 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:46:50,431 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 16:46:50,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79699510f/7e901993786e45d9bad3a97750ccbb55/FLAG848f7501f [2024-06-27 16:46:50,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79699510f/7e901993786e45d9bad3a97750ccbb55 [2024-06-27 16:46:50,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:46:50,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:46:50,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:46:50,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:46:50,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:46:50,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,463 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aea475a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50, skipping insertion in model container [2024-06-27 16:46:50,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,487 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:46:50,617 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-06-27 16:46:50,624 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:46:50,630 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:46:50,653 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-06-27 16:46:50,656 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:46:50,670 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:46:50,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50 WrapperNode [2024-06-27 16:46:50,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:46:50,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:46:50,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:46:50,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:46:50,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,722 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 307 [2024-06-27 16:46:50,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:46:50,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:46:50,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:46:50,726 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:46:50,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,751 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,768 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:46:50,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:46:50,797 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:46:50,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:46:50,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:46:50,798 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (1/1) ... [2024-06-27 16:46:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:46:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:50,849 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) [2024-06-27 16:46:50,874 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 [2024-06-27 16:46:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:46:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:46:50,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:46:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:46:50,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:46:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:46:50,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:46:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 16:46:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 16:46:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:46:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:46:50,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:46:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:46:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:46:50,901 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:46:51,001 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:46:51,003 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:46:51,381 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:46:51,381 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:46:51,700 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:46:51,700 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 16:46:51,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:46:51 BoogieIcfgContainer [2024-06-27 16:46:51,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:46:51,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:46:51,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:46:51,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:46:51,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:46:50" (1/3) ... [2024-06-27 16:46:51,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fee2fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:46:51, skipping insertion in model container [2024-06-27 16:46:51,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:46:50" (2/3) ... [2024-06-27 16:46:51,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fee2fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:46:51, skipping insertion in model container [2024-06-27 16:46:51,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:46:51" (3/3) ... [2024-06-27 16:46:51,708 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-06-27 16:46:51,715 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:46:51,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:46:51,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:46:51,723 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:46:51,783 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 16:46:51,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2024-06-27 16:46:51,869 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-06-27 16:46:51,869 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:46:51,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-06-27 16:46:51,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2024-06-27 16:46:51,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2024-06-27 16:46:51,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:46:51,895 INFO L357 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, mHoare=true, 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;@2e528d91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:46:51,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:46:51,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:46:51,912 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-06-27 16:46:51,912 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:46:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:51,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:51,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:51,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1822743091, now seen corresponding path program 1 times [2024-06-27 16:46:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488959008] [2024-06-27 16:46:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488959008] [2024-06-27 16:46:52,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488959008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:46:52,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:46:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:46:52,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031047761] [2024-06-27 16:46:52,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:46:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:46:52,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:46:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:46:52,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-06-27 16:46:52,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:52,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:52,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-06-27 16:46:52,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:52,970 INFO L124 PetriNetUnfolderBase]: 1705/2599 cut-off events. [2024-06-27 16:46:52,970 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-06-27 16:46:52,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 2599 events. 1705/2599 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15364 event pairs, 201 based on Foata normal form. 120/2681 useless extension candidates. Maximal degree in co-relation 4417. Up to 1389 conditions per place. [2024-06-27 16:46:52,990 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 62 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-06-27 16:46:52,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 363 flow [2024-06-27 16:46:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:46:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:46:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 16:46:53,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-06-27 16:46:53,004 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 6 states and 185 transitions. [2024-06-27 16:46:53,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 363 flow [2024-06-27 16:46:53,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 84 transitions, 325 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:46:53,014 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 141 flow [2024-06-27 16:46:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-06-27 16:46:53,018 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 16:46:53,019 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 141 flow [2024-06-27 16:46:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:53,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:46:53,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:53,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -101555562, now seen corresponding path program 1 times [2024-06-27 16:46:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270973681] [2024-06-27 16:46:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270973681] [2024-06-27 16:46:53,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270973681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:46:53,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:46:53,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:46:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250987287] [2024-06-27 16:46:53,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:46:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:46:53,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:46:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:46:53,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:46:53,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:53,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:53,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:46:53,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:53,518 INFO L124 PetriNetUnfolderBase]: 1603/2500 cut-off events. [2024-06-27 16:46:53,519 INFO L125 PetriNetUnfolderBase]: For 2077/2293 co-relation queries the response was YES. [2024-06-27 16:46:53,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6049 conditions, 2500 events. 1603/2500 cut-off events. For 2077/2293 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15295 event pairs, 1039 based on Foata normal form. 314/2572 useless extension candidates. Maximal degree in co-relation 2728. Up to 1963 conditions per place. [2024-06-27 16:46:53,535 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-06-27 16:46:53,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 295 flow [2024-06-27 16:46:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:46:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:46:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 16:46:53,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 16:46:53,539 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 141 flow. Second operand 5 states and 154 transitions. [2024-06-27 16:46:53,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 295 flow [2024-06-27 16:46:53,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:46:53,542 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 158 flow [2024-06-27 16:46:53,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 16:46:53,543 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-06-27 16:46:53,543 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 158 flow [2024-06-27 16:46:53,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:53,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:53,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:46:53,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:53,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash -319821762, now seen corresponding path program 1 times [2024-06-27 16:46:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508172792] [2024-06-27 16:46:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:46:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508172792] [2024-06-27 16:46:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508172792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:46:53,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:46:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:46:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226360206] [2024-06-27 16:46:53,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:46:53,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:46:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:46:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:46:53,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-06-27 16:46:53,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-06-27 16:46:53,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:53,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-06-27 16:46:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:54,193 INFO L124 PetriNetUnfolderBase]: 2845/4445 cut-off events. [2024-06-27 16:46:54,193 INFO L125 PetriNetUnfolderBase]: For 2608/2608 co-relation queries the response was YES. [2024-06-27 16:46:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 4445 events. 2845/4445 cut-off events. For 2608/2608 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29032 event pairs, 947 based on Foata normal form. 60/4384 useless extension candidates. Maximal degree in co-relation 10714. Up to 1761 conditions per place. [2024-06-27 16:46:54,220 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 70 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-06-27 16:46:54,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 455 flow [2024-06-27 16:46:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:46:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:46:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 16:46:54,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-06-27 16:46:54,222 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 158 flow. Second operand 6 states and 190 transitions. [2024-06-27 16:46:54,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 455 flow [2024-06-27 16:46:54,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 441 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 16:46:54,228 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-06-27 16:46:54,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 16:46:54,229 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-06-27 16:46:54,229 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-06-27 16:46:54,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-06-27 16:46:54,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:54,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:54,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:46:54,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:54,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2046724848, now seen corresponding path program 1 times [2024-06-27 16:46:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:54,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503428911] [2024-06-27 16:46:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:46:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:54,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503428911] [2024-06-27 16:46:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503428911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:46:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:46:54,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:46:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328043566] [2024-06-27 16:46:54,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:46:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:46:54,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:54,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:46:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:46:54,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:46:54,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-06-27 16:46:54,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:54,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:46:54,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:54,653 INFO L124 PetriNetUnfolderBase]: 1887/3148 cut-off events. [2024-06-27 16:46:54,653 INFO L125 PetriNetUnfolderBase]: For 5777/6017 co-relation queries the response was YES. [2024-06-27 16:46:54,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 3148 events. 1887/3148 cut-off events. For 5777/6017 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20777 event pairs, 297 based on Foata normal form. 204/3237 useless extension candidates. Maximal degree in co-relation 8968. Up to 2356 conditions per place. [2024-06-27 16:46:54,677 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 42 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2024-06-27 16:46:54,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 354 flow [2024-06-27 16:46:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:46:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:46:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-27 16:46:54,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-06-27 16:46:54,678 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 3 states and 105 transitions. [2024-06-27 16:46:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 354 flow [2024-06-27 16:46:54,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 347 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 16:46:54,684 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 226 flow [2024-06-27 16:46:54,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-27 16:46:54,685 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-06-27 16:46:54,685 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 226 flow [2024-06-27 16:46:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-06-27 16:46:54,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:54,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:54,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:46:54,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash -167366565, now seen corresponding path program 1 times [2024-06-27 16:46:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:54,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563687538] [2024-06-27 16:46:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:54,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:55,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:55,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563687538] [2024-06-27 16:46:55,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563687538] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:55,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708676432] [2024-06-27 16:46:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:55,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:55,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:55,266 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) [2024-06-27 16:46:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:46:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:55,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 16:46:55,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:55,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 16:46:55,678 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 15 treesize of output 7 [2024-06-27 16:46:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:55,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:56,155 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 39 treesize of output 35 [2024-06-27 16:46:56,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-06-27 16:46:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708676432] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:56,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:56,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-06-27 16:46:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174247401] [2024-06-27 16:46:56,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:56,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:46:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:46:56,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:46:56,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:46:56,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 226 flow. Second operand has 18 states, 18 states have (on average 24.055555555555557) internal successors, (433), 18 states have internal predecessors, (433), 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) [2024-06-27 16:46:56,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:56,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:46:56,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:58,061 INFO L124 PetriNetUnfolderBase]: 6564/10730 cut-off events. [2024-06-27 16:46:58,061 INFO L125 PetriNetUnfolderBase]: For 20636/21385 co-relation queries the response was YES. [2024-06-27 16:46:58,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29869 conditions, 10730 events. 6564/10730 cut-off events. For 20636/21385 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 79811 event pairs, 1278 based on Foata normal form. 698/10904 useless extension candidates. Maximal degree in co-relation 14741. Up to 3723 conditions per place. [2024-06-27 16:46:58,129 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 153 selfloop transitions, 41 changer transitions 8/224 dead transitions. [2024-06-27 16:46:58,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 224 transitions, 1275 flow [2024-06-27 16:46:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:46:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:46:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 540 transitions. [2024-06-27 16:46:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-06-27 16:46:58,134 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 226 flow. Second operand 17 states and 540 transitions. [2024-06-27 16:46:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 224 transitions, 1275 flow [2024-06-27 16:46:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 224 transitions, 1249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:46:58,164 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 569 flow [2024-06-27 16:46:58,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=569, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2024-06-27 16:46:58,165 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 16:46:58,165 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 569 flow [2024-06-27 16:46:58,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.055555555555557) internal successors, (433), 18 states have internal predecessors, (433), 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) [2024-06-27 16:46:58,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:58,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:58,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:46:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:58,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:46:58,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash -698702159, now seen corresponding path program 1 times [2024-06-27 16:46:58,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:58,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480956648] [2024-06-27 16:46:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480956648] [2024-06-27 16:46:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480956648] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761953746] [2024-06-27 16:46:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:58,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:58,996 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) [2024-06-27 16:46:58,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:46:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:59,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:46:59,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:59,215 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 23 treesize of output 7 [2024-06-27 16:46:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:46:59,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:59,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:59,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 16:46:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:46:59,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761953746] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:59,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:59,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-06-27 16:46:59,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087391446] [2024-06-27 16:46:59,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:46:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:46:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:46:59,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:46:59,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 569 flow. Second operand has 15 states, 15 states have (on average 24.266666666666666) internal successors, (364), 15 states have internal predecessors, (364), 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) [2024-06-27 16:46:59,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:59,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:46:59,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:01,109 INFO L124 PetriNetUnfolderBase]: 7982/13184 cut-off events. [2024-06-27 16:47:01,110 INFO L125 PetriNetUnfolderBase]: For 30893/31795 co-relation queries the response was YES. [2024-06-27 16:47:01,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39744 conditions, 13184 events. 7982/13184 cut-off events. For 30893/31795 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 101825 event pairs, 880 based on Foata normal form. 644/13315 useless extension candidates. Maximal degree in co-relation 28639. Up to 5047 conditions per place. [2024-06-27 16:47:01,200 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 105 selfloop transitions, 54 changer transitions 5/186 dead transitions. [2024-06-27 16:47:01,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 186 transitions, 1295 flow [2024-06-27 16:47:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:47:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:47:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 383 transitions. [2024-06-27 16:47:01,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137820512820513 [2024-06-27 16:47:01,202 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 569 flow. Second operand 13 states and 383 transitions. [2024-06-27 16:47:01,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 186 transitions, 1295 flow [2024-06-27 16:47:01,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 186 transitions, 1277 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:01,230 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 909 flow [2024-06-27 16:47:01,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=909, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-27 16:47:01,233 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-06-27 16:47:01,233 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 909 flow [2024-06-27 16:47:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.266666666666666) internal successors, (364), 15 states have internal predecessors, (364), 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) [2024-06-27 16:47:01,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:01,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:01,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:01,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:47:01,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:47:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1953496888, now seen corresponding path program 1 times [2024-06-27 16:47:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013902257] [2024-06-27 16:47:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013902257] [2024-06-27 16:47:01,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013902257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:01,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:01,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:47:01,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165129284] [2024-06-27 16:47:01,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:47:01,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:47:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:47:01,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:47:01,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 909 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:01,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:01,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:47:01,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:03,284 INFO L124 PetriNetUnfolderBase]: 11081/17896 cut-off events. [2024-06-27 16:47:03,285 INFO L125 PetriNetUnfolderBase]: For 70618/72280 co-relation queries the response was YES. [2024-06-27 16:47:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56912 conditions, 17896 events. 11081/17896 cut-off events. For 70618/72280 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 137192 event pairs, 2942 based on Foata normal form. 1526/18627 useless extension candidates. Maximal degree in co-relation 44664. Up to 9661 conditions per place. [2024-06-27 16:47:03,407 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 136 selfloop transitions, 8 changer transitions 0/166 dead transitions. [2024-06-27 16:47:03,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 166 transitions, 1648 flow [2024-06-27 16:47:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:47:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:47:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 16:47:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-06-27 16:47:03,409 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 909 flow. Second operand 3 states and 107 transitions. [2024-06-27 16:47:03,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 166 transitions, 1648 flow [2024-06-27 16:47:03,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 166 transitions, 1622 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:03,452 INFO L231 Difference]: Finished difference. Result has 92 places, 120 transitions, 943 flow [2024-06-27 16:47:03,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=92, PETRI_TRANSITIONS=120} [2024-06-27 16:47:03,453 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-06-27 16:47:03,455 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 120 transitions, 943 flow [2024-06-27 16:47:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:03,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:03,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:03,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:47:03,457 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:47:03,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:03,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1604433398, now seen corresponding path program 2 times [2024-06-27 16:47:03,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:03,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577061591] [2024-06-27 16:47:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:03,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577061591] [2024-06-27 16:47:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577061591] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123944273] [2024-06-27 16:47:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:47:03,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:03,564 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) [2024-06-27 16:47:03,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:47:03,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:03,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 16:47:03,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:03,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123944273] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:03,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:03,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-06-27 16:47:03,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10814916] [2024-06-27 16:47:03,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:03,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:47:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:47:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:47:03,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:47:03,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 120 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 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) [2024-06-27 16:47:03,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:03,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:47:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:06,729 INFO L124 PetriNetUnfolderBase]: 17901/29447 cut-off events. [2024-06-27 16:47:06,729 INFO L125 PetriNetUnfolderBase]: For 98769/100209 co-relation queries the response was YES. [2024-06-27 16:47:06,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96659 conditions, 29447 events. 17901/29447 cut-off events. For 98769/100209 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 249845 event pairs, 3027 based on Foata normal form. 1473/29794 useless extension candidates. Maximal degree in co-relation 90640. Up to 12494 conditions per place. [2024-06-27 16:47:06,918 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 132 selfloop transitions, 42 changer transitions 0/196 dead transitions. [2024-06-27 16:47:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1827 flow [2024-06-27 16:47:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:47:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:47:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-06-27 16:47:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.78125 [2024-06-27 16:47:06,920 INFO L175 Difference]: Start difference. First operand has 92 places, 120 transitions, 943 flow. Second operand 4 states and 150 transitions. [2024-06-27 16:47:06,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1827 flow [2024-06-27 16:47:07,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 196 transitions, 1817 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:07,098 INFO L231 Difference]: Finished difference. Result has 96 places, 143 transitions, 1437 flow [2024-06-27 16:47:07,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1437, PETRI_PLACES=96, PETRI_TRANSITIONS=143} [2024-06-27 16:47:07,099 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-06-27 16:47:07,099 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 143 transitions, 1437 flow [2024-06-27 16:47:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 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) [2024-06-27 16:47:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:07,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:07,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 16:47:07,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:07,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:47:07,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1108091071, now seen corresponding path program 1 times [2024-06-27 16:47:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30825914] [2024-06-27 16:47:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:47:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30825914] [2024-06-27 16:47:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30825914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:07,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833882506] [2024-06-27 16:47:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:47:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:47:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:47:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-06-27 16:47:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 143 transitions, 1437 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-06-27 16:47:07,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:07,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-06-27 16:47:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:11,130 INFO L124 PetriNetUnfolderBase]: 19658/32433 cut-off events. [2024-06-27 16:47:11,130 INFO L125 PetriNetUnfolderBase]: For 164616/167212 co-relation queries the response was YES. [2024-06-27 16:47:11,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116145 conditions, 32433 events. 19658/32433 cut-off events. For 164616/167212 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 283937 event pairs, 12933 based on Foata normal form. 2826/33091 useless extension candidates. Maximal degree in co-relation 106782. Up to 18508 conditions per place. [2024-06-27 16:47:11,405 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 145 selfloop transitions, 11 changer transitions 7/185 dead transitions. [2024-06-27 16:47:11,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 185 transitions, 2206 flow [2024-06-27 16:47:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:47:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:47:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-27 16:47:11,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 16:47:11,407 INFO L175 Difference]: Start difference. First operand has 96 places, 143 transitions, 1437 flow. Second operand 4 states and 132 transitions. [2024-06-27 16:47:11,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 185 transitions, 2206 flow [2024-06-27 16:47:11,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 185 transitions, 2192 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:11,508 INFO L231 Difference]: Finished difference. Result has 100 places, 139 transitions, 1430 flow [2024-06-27 16:47:11,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1430, PETRI_PLACES=100, PETRI_TRANSITIONS=139} [2024-06-27 16:47:11,509 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-06-27 16:47:11,509 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 139 transitions, 1430 flow [2024-06-27 16:47:11,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-06-27 16:47:11,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:11,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:11,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:47:11,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:47:11,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash -126545709, now seen corresponding path program 1 times [2024-06-27 16:47:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:11,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181968462] [2024-06-27 16:47:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181968462] [2024-06-27 16:47:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181968462] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60725416] [2024-06-27 16:47:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:11,926 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) [2024-06-27 16:47:11,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:47:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:12,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:47:12,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:12,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:47:12,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60725416] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:12,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:12,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 25 [2024-06-27 16:47:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307949445] [2024-06-27 16:47:12,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:47:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:47:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:47:12,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 16:47:12,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 139 transitions, 1430 flow. Second operand has 26 states, 26 states have (on average 15.115384615384615) internal successors, (393), 26 states have internal predecessors, (393), 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) [2024-06-27 16:47:12,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:12,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 16:47:12,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand