./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.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-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:32:40,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:32:40,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:32:40,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:32:40,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:32:40,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:32:40,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:32:40,206 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:32:40,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:32:40,207 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:32:40,207 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:32:40,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:32:40,208 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:32:40,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:32:40,209 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:32:40,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:32:40,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:32:40,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:32:40,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:32:40,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:32:40,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:32:40,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:32:40,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:32:40,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:32:40,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:32:40,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:32:40,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:32:40,212 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:32:40,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:32:40,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:32:40,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:32:40,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:32:40,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:32:40,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:32:40,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:32:40,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:32:40,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:32:40,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:32:40,215 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:32:40,215 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:32:40,216 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:32:40,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:32:40,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:32:40,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-06-27 17:32:40,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:32:40,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:32:40,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:32:40,491 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:32:40,491 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:32:40,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2024-06-27 17:32:41,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:32:41,658 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:32:41,658 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2024-06-27 17:32:41,677 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc94de12/3006a436693e4387a69d0e04781ba42e/FLAGf2f630f16 [2024-06-27 17:32:41,689 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc94de12/3006a436693e4387a69d0e04781ba42e [2024-06-27 17:32:41,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:32:41,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:32:41,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:32:41,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:32:41,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:32:41,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:41,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e894131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41, skipping insertion in model container [2024-06-27 17:32:41,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:41,716 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:32:41,846 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-more-buffer-series.wvr.c[4403,4416] [2024-06-27 17:32:41,867 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:32:41,874 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:32:41,898 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-more-buffer-series.wvr.c[4403,4416] [2024-06-27 17:32:41,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:32:41,928 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:32:41,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41 WrapperNode [2024-06-27 17:32:41,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:32:41,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:32:41,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:32:41,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:32:41,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:41,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:41,987 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 340 [2024-06-27 17:32:41,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:32:41,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:32:41,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:32:41,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:32:41,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:41,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,011 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,037 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-27 17:32:42,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,048 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:32:42,076 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:32:42,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:32:42,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:32:42,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (1/1) ... [2024-06-27 17:32:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:32:42,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:32:42,110 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 17:32:42,118 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 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:32:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:32:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:32:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:32:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:32:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 17:32:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 17:32:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 17:32:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 17:32:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:32:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:32:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:32:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:32:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:32:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:32:42,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:32:42,150 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 17:32:42,232 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:32:42,233 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:32:42,630 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:32:42,630 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:32:42,896 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:32:42,896 INFO L320 CfgBuilder]: Removed 7 assume(true) statements. [2024-06-27 17:32:42,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:32:42 BoogieIcfgContainer [2024-06-27 17:32:42,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:32:42,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:32:42,900 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:32:42,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:32:42,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:32:41" (1/3) ... [2024-06-27 17:32:42,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c924ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:32:42, skipping insertion in model container [2024-06-27 17:32:42,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:32:41" (2/3) ... [2024-06-27 17:32:42,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c924ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:32:42, skipping insertion in model container [2024-06-27 17:32:42,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:32:42" (3/3) ... [2024-06-27 17:32:42,905 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-06-27 17:32:42,912 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:32:42,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:32:42,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:32:42,920 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:32:43,002 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 17:32:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 52 transitions, 132 flow [2024-06-27 17:32:43,071 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-06-27 17:32:43,071 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:32:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 7/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-06-27 17:32:43,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 52 transitions, 132 flow [2024-06-27 17:32:43,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 47 transitions, 118 flow [2024-06-27 17:32:43,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:32:43,095 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;@5038026d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:32:43,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:32:43,113 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:32:43,114 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-06-27 17:32:43,114 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:32:43,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:43,115 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] [2024-06-27 17:32:43,115 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 17:32:43,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1756639892, now seen corresponding path program 1 times [2024-06-27 17:32:43,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:43,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914812600] [2024-06-27 17:32:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:43,444 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 17:32:43,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914812600] [2024-06-27 17:32:43,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914812600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:43,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:32:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941226593] [2024-06-27 17:32:43,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:32:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:32:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:32:43,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-27 17:32:43,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 17:32:43,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:43,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-27 17:32:43,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:43,939 INFO L124 PetriNetUnfolderBase]: 2408/3712 cut-off events. [2024-06-27 17:32:43,940 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-27 17:32:43,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6983 conditions, 3712 events. 2408/3712 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21304 event pairs, 472 based on Foata normal form. 1/3493 useless extension candidates. Maximal degree in co-relation 6291. Up to 2067 conditions per place. [2024-06-27 17:32:43,964 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 43 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2024-06-27 17:32:43,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 261 flow [2024-06-27 17:32:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:32:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:32:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-06-27 17:32:43,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7115384615384616 [2024-06-27 17:32:43,977 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 118 flow. Second operand 3 states and 111 transitions. [2024-06-27 17:32:43,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 261 flow [2024-06-27 17:32:43,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:32:43,988 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 121 flow [2024-06-27 17:32:43,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-06-27 17:32:43,994 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-06-27 17:32:43,994 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 121 flow [2024-06-27 17:32:43,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 17:32:43,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:43,995 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 17:32:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:32:43,996 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 17:32:43,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -891124569, now seen corresponding path program 1 times [2024-06-27 17:32:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136441474] [2024-06-27 17:32:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:44,143 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 17:32:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136441474] [2024-06-27 17:32:44,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136441474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:44,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:32:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576418159] [2024-06-27 17:32:44,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:32:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:32:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:32:44,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-27 17:32:44,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 121 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 17:32:44,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:44,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-27 17:32:44,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:44,537 INFO L124 PetriNetUnfolderBase]: 2398/3648 cut-off events. [2024-06-27 17:32:44,537 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-06-27 17:32:44,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7581 conditions, 3648 events. 2398/3648 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20905 event pairs, 549 based on Foata normal form. 76/3563 useless extension candidates. Maximal degree in co-relation 2649. Up to 2321 conditions per place. [2024-06-27 17:32:44,556 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 51 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-06-27 17:32:44,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 283 flow [2024-06-27 17:32:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:32:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:32:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-06-27 17:32:44,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2024-06-27 17:32:44,560 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 121 flow. Second operand 3 states and 114 transitions. [2024-06-27 17:32:44,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 283 flow [2024-06-27 17:32:44,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:44,563 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 132 flow [2024-06-27 17:32:44,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-06-27 17:32:44,564 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2024-06-27 17:32:44,564 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 132 flow [2024-06-27 17:32:44,564 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 17:32:44,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:44,565 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 17:32:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:32:44,567 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 17:32:44,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1628986663, now seen corresponding path program 1 times [2024-06-27 17:32:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:44,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711777452] [2024-06-27 17:32:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:44,681 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 17:32:44,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711777452] [2024-06-27 17:32:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711777452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:44,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:32:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055377209] [2024-06-27 17:32:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:32:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:32:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:32:44,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-27 17:32:44,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 132 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 17:32:44,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:44,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-27 17:32:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:45,027 INFO L124 PetriNetUnfolderBase]: 2363/3739 cut-off events. [2024-06-27 17:32:45,028 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2024-06-27 17:32:45,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8147 conditions, 3739 events. 2363/3739 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22719 event pairs, 571 based on Foata normal form. 35/3600 useless extension candidates. Maximal degree in co-relation 5952. Up to 2334 conditions per place. [2024-06-27 17:32:45,044 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 51 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-06-27 17:32:45,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 299 flow [2024-06-27 17:32:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:32:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:32:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-06-27 17:32:45,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2024-06-27 17:32:45,047 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 132 flow. Second operand 3 states and 112 transitions. [2024-06-27 17:32:45,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 299 flow [2024-06-27 17:32:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:45,051 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 144 flow [2024-06-27 17:32:45,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-27 17:32:45,053 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-27 17:32:45,053 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 144 flow [2024-06-27 17:32:45,053 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 17:32:45,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:45,053 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] [2024-06-27 17:32:45,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:32:45,054 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 17:32:45,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1573378156, now seen corresponding path program 1 times [2024-06-27 17:32:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:45,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540861133] [2024-06-27 17:32:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:45,188 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 17:32:45,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540861133] [2024-06-27 17:32:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540861133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:45,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:32:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701759101] [2024-06-27 17:32:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:32:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:32:45,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:32:45,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-27 17:32:45,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 17:32:45,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:45,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-27 17:32:45,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:45,607 INFO L124 PetriNetUnfolderBase]: 2795/4444 cut-off events. [2024-06-27 17:32:45,607 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-06-27 17:32:45,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10251 conditions, 4444 events. 2795/4444 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29407 event pairs, 2080 based on Foata normal form. 94/4053 useless extension candidates. Maximal degree in co-relation 4768. Up to 3079 conditions per place. [2024-06-27 17:32:45,629 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 58 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-06-27 17:32:45,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 347 flow [2024-06-27 17:32:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:32:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:32:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 17:32:45,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-27 17:32:45,630 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 144 flow. Second operand 5 states and 162 transitions. [2024-06-27 17:32:45,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 347 flow [2024-06-27 17:32:45,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:45,633 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 170 flow [2024-06-27 17:32:45,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 17:32:45,634 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2024-06-27 17:32:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 170 flow [2024-06-27 17:32:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 17:32:45,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:45,635 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] [2024-06-27 17:32:45,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:32:45,635 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 17:32:45,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash 29395084, now seen corresponding path program 1 times [2024-06-27 17:32:45,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:45,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721289064] [2024-06-27 17:32:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:45,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:45,741 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 17:32:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721289064] [2024-06-27 17:32:45,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721289064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:45,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:45,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:32:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376111821] [2024-06-27 17:32:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:32:45,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:32:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:32:45,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 52 [2024-06-27 17:32:45,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 17:32:45,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:45,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 52 [2024-06-27 17:32:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:46,198 INFO L124 PetriNetUnfolderBase]: 3459/5671 cut-off events. [2024-06-27 17:32:46,199 INFO L125 PetriNetUnfolderBase]: For 2903/2903 co-relation queries the response was YES. [2024-06-27 17:32:46,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12804 conditions, 5671 events. 3459/5671 cut-off events. For 2903/2903 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40579 event pairs, 2644 based on Foata normal form. 131/5188 useless extension candidates. Maximal degree in co-relation 10447. Up to 3845 conditions per place. [2024-06-27 17:32:46,225 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 59 selfloop transitions, 6 changer transitions 2/84 dead transitions. [2024-06-27 17:32:46,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 400 flow [2024-06-27 17:32:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:32:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:32:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 17:32:46,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-27 17:32:46,227 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 170 flow. Second operand 5 states and 162 transitions. [2024-06-27 17:32:46,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 400 flow [2024-06-27 17:32:46,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 396 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:46,229 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 209 flow [2024-06-27 17:32:46,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 17:32:46,230 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-06-27 17:32:46,230 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 209 flow [2024-06-27 17:32:46,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 17:32:46,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:46,231 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] [2024-06-27 17:32:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:32:46,231 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 17:32:46,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1852658935, now seen corresponding path program 1 times [2024-06-27 17:32:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:46,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994674824] [2024-06-27 17:32:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:46,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:32:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994674824] [2024-06-27 17:32:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994674824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:32:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170539817] [2024-06-27 17:32:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:32:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:32:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:32:46,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-27 17:32:46,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 17:32:46,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:46,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-27 17:32:46,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:47,590 INFO L124 PetriNetUnfolderBase]: 8319/13428 cut-off events. [2024-06-27 17:32:47,591 INFO L125 PetriNetUnfolderBase]: For 5838/5855 co-relation queries the response was YES. [2024-06-27 17:32:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30064 conditions, 13428 events. 8319/13428 cut-off events. For 5838/5855 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 101177 event pairs, 3756 based on Foata normal form. 0/12312 useless extension candidates. Maximal degree in co-relation 22628. Up to 4773 conditions per place. [2024-06-27 17:32:47,647 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 100 selfloop transitions, 9 changer transitions 1/124 dead transitions. [2024-06-27 17:32:47,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 124 transitions, 645 flow [2024-06-27 17:32:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:32:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:32:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-27 17:32:47,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2024-06-27 17:32:47,648 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 209 flow. Second operand 6 states and 201 transitions. [2024-06-27 17:32:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 124 transitions, 645 flow [2024-06-27 17:32:47,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 638 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:47,652 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 262 flow [2024-06-27 17:32:47,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-27 17:32:47,653 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 19 predicate places. [2024-06-27 17:32:47,653 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 262 flow [2024-06-27 17:32:47,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 17:32:47,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:47,653 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] [2024-06-27 17:32:47,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:32:47,654 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 17:32:47,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash -655930463, now seen corresponding path program 1 times [2024-06-27 17:32:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:47,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632158044] [2024-06-27 17:32:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:32:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632158044] [2024-06-27 17:32:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632158044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:32:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920867132] [2024-06-27 17:32:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:32:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:32:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:32:47,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-27 17:32:47,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 17:32:47,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:47,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-27 17:32:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:49,099 INFO L124 PetriNetUnfolderBase]: 8713/13222 cut-off events. [2024-06-27 17:32:49,100 INFO L125 PetriNetUnfolderBase]: For 6911/7127 co-relation queries the response was YES. [2024-06-27 17:32:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 13222 events. 8713/13222 cut-off events. For 6911/7127 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 92573 event pairs, 3825 based on Foata normal form. 0/11912 useless extension candidates. Maximal degree in co-relation 26763. Up to 5905 conditions per place. [2024-06-27 17:32:49,158 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 63 selfloop transitions, 6 changer transitions 29/112 dead transitions. [2024-06-27 17:32:49,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 602 flow [2024-06-27 17:32:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:32:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:32:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 17:32:49,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-27 17:32:49,160 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 262 flow. Second operand 6 states and 191 transitions. [2024-06-27 17:32:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 602 flow [2024-06-27 17:32:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 591 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 17:32:49,163 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 250 flow [2024-06-27 17:32:49,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2024-06-27 17:32:49,164 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2024-06-27 17:32:49,164 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 250 flow [2024-06-27 17:32:49,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 17:32:49,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:49,165 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 17:32:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:32:49,165 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 17:32:49,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1960680660, now seen corresponding path program 1 times [2024-06-27 17:32:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:49,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107780508] [2024-06-27 17:32:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:49,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:32:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107780508] [2024-06-27 17:32:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107780508] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:32:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778530741] [2024-06-27 17:32:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:32:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:32:49,376 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 17:32:49,418 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 17:32:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:49,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:32:49,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:32:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:32:49,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:32:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:32:49,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778530741] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:32:49,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:32:49,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-06-27 17:32:49,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887226478] [2024-06-27 17:32:49,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:32:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:32:49,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:32:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:32:50,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-27 17:32:50,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 250 flow. Second operand has 18 states, 18 states have (on average 21.333333333333332) internal successors, (384), 18 states have internal predecessors, (384), 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 17:32:50,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:50,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-27 17:32:50,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:51,892 INFO L124 PetriNetUnfolderBase]: 11916/17554 cut-off events. [2024-06-27 17:32:51,893 INFO L125 PetriNetUnfolderBase]: For 9682/9682 co-relation queries the response was YES. [2024-06-27 17:32:51,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44269 conditions, 17554 events. 11916/17554 cut-off events. For 9682/9682 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 121240 event pairs, 949 based on Foata normal form. 0/17013 useless extension candidates. Maximal degree in co-relation 39905. Up to 4001 conditions per place. [2024-06-27 17:32:51,977 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 142 selfloop transitions, 18 changer transitions 8/182 dead transitions. [2024-06-27 17:32:51,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 182 transitions, 1022 flow [2024-06-27 17:32:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:32:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:32:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 354 transitions. [2024-06-27 17:32:51,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-06-27 17:32:51,979 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 250 flow. Second operand 12 states and 354 transitions. [2024-06-27 17:32:51,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 182 transitions, 1022 flow [2024-06-27 17:32:51,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 182 transitions, 1001 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:32:51,994 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 305 flow [2024-06-27 17:32:51,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=305, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-27 17:32:51,995 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2024-06-27 17:32:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 305 flow [2024-06-27 17:32:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.333333333333332) internal successors, (384), 18 states have internal predecessors, (384), 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 17:32:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:51,995 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 17:32:52,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:32:52,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:32:52,209 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 17:32:52,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash -833904744, now seen corresponding path program 2 times [2024-06-27 17:32:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:52,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152141035] [2024-06-27 17:32:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:52,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:52,475 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 17:32:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152141035] [2024-06-27 17:32:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152141035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:32:52,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:32:52,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:32:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665303842] [2024-06-27 17:32:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:32:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:32:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:32:52,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 52 [2024-06-27 17:32:52,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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 17:32:52,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:52,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 52 [2024-06-27 17:32:52,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:53,450 INFO L124 PetriNetUnfolderBase]: 7252/10819 cut-off events. [2024-06-27 17:32:53,450 INFO L125 PetriNetUnfolderBase]: For 15002/15354 co-relation queries the response was YES. [2024-06-27 17:32:53,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31167 conditions, 10819 events. 7252/10819 cut-off events. For 15002/15354 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 71585 event pairs, 533 based on Foata normal form. 448/11028 useless extension candidates. Maximal degree in co-relation 31132. Up to 5468 conditions per place. [2024-06-27 17:32:53,500 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 80 selfloop transitions, 5 changer transitions 2/107 dead transitions. [2024-06-27 17:32:53,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 679 flow [2024-06-27 17:32:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:32:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:32:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:32:53,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-27 17:32:53,502 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 305 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:32:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 679 flow [2024-06-27 17:32:53,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 628 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 17:32:53,510 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 271 flow [2024-06-27 17:32:53,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-27 17:32:53,511 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-27 17:32:53,511 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 271 flow [2024-06-27 17:32:53,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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 17:32:53,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:53,511 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, 1] [2024-06-27 17:32:53,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:32:53,512 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 17:32:53,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash -556028396, now seen corresponding path program 1 times [2024-06-27 17:32:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141067288] [2024-06-27 17:32:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:32:53,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141067288] [2024-06-27 17:32:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141067288] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:32:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319483419] [2024-06-27 17:32:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:53,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:32:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:32:53,703 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 17:32:53,738 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 17:32:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:53,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:32:53,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:32:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:32:54,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:32:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:32:54,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319483419] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:32:54,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:32:54,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2024-06-27 17:32:54,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760317477] [2024-06-27 17:32:54,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:32:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:32:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:32:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:32:54,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-27 17:32:54,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 271 flow. Second operand has 17 states, 17 states have (on average 20.88235294117647) internal successors, (355), 17 states have internal predecessors, (355), 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 17:32:54,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:54,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-27 17:32:54,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:32:57,939 INFO L124 PetriNetUnfolderBase]: 22162/31915 cut-off events. [2024-06-27 17:32:57,939 INFO L125 PetriNetUnfolderBase]: For 36855/37732 co-relation queries the response was YES. [2024-06-27 17:32:58,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91791 conditions, 31915 events. 22162/31915 cut-off events. For 36855/37732 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 219618 event pairs, 387 based on Foata normal form. 1146/32400 useless extension candidates. Maximal degree in co-relation 91758. Up to 4291 conditions per place. [2024-06-27 17:32:58,116 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 440 selfloop transitions, 180 changer transitions 0/633 dead transitions. [2024-06-27 17:32:58,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 633 transitions, 3956 flow [2024-06-27 17:32:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 17:32:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 17:32:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1061 transitions. [2024-06-27 17:32:58,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514553014553014 [2024-06-27 17:32:58,121 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 271 flow. Second operand 37 states and 1061 transitions. [2024-06-27 17:32:58,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 633 transitions, 3956 flow [2024-06-27 17:32:58,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 633 transitions, 3904 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:32:58,140 INFO L231 Difference]: Finished difference. Result has 139 places, 246 transitions, 2009 flow [2024-06-27 17:32:58,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2009, PETRI_PLACES=139, PETRI_TRANSITIONS=246} [2024-06-27 17:32:58,141 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 86 predicate places. [2024-06-27 17:32:58,141 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 246 transitions, 2009 flow [2024-06-27 17:32:58,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.88235294117647) internal successors, (355), 17 states have internal predecessors, (355), 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 17:32:58,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:32:58,141 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, 1] [2024-06-27 17:32:58,153 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 17:32:58,353 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,SelfDestructingSolverStorable9 [2024-06-27 17:32:58,353 INFO L420 AbstractCegarLoop]: === Iteration 11 === 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 17:32:58,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:32:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1107838688, now seen corresponding path program 1 times [2024-06-27 17:32:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:32:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489466816] [2024-06-27 17:32:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:32:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:32:58,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:32:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489466816] [2024-06-27 17:32:58,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489466816] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:32:58,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674386455] [2024-06-27 17:32:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:32:58,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:32:58,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:32:58,501 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 17:32:58,518 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 17:32:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:32:58,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:32:58,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:32:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:32:58,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:32:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:32:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674386455] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:32:58,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:32:58,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 11 [2024-06-27 17:32:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409650689] [2024-06-27 17:32:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:32:58,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:32:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:32:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:32:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:32:58,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-27 17:32:58,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 246 transitions, 2009 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 17:32:58,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:32:58,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-27 17:32:58,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:33:08,274 INFO L124 PetriNetUnfolderBase]: 50407/72218 cut-off events. [2024-06-27 17:33:08,274 INFO L125 PetriNetUnfolderBase]: For 986842/989112 co-relation queries the response was YES. [2024-06-27 17:33:08,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357744 conditions, 72218 events. 50407/72218 cut-off events. For 986842/989112 co-relation queries the response was YES. Maximal size of possible extension queue 2684. Compared 518428 event pairs, 4938 based on Foata normal form. 1911/73930 useless extension candidates. Maximal degree in co-relation 357682. Up to 23482 conditions per place. [2024-06-27 17:33:09,176 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 471 selfloop transitions, 51 changer transitions 0/533 dead transitions. [2024-06-27 17:33:09,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 533 transitions, 5733 flow [2024-06-27 17:33:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:33:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:33:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 17:33:09,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 17:33:09,193 INFO L175 Difference]: Start difference. First operand has 139 places, 246 transitions, 2009 flow. Second operand 6 states and 184 transitions. [2024-06-27 17:33:09,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 533 transitions, 5733 flow [2024-06-27 17:33:12,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 533 transitions, 5610 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 17:33:12,809 INFO L231 Difference]: Finished difference. Result has 141 places, 273 transitions, 2349 flow [2024-06-27 17:33:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2349, PETRI_PLACES=141, PETRI_TRANSITIONS=273} [2024-06-27 17:33:12,809 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-06-27 17:33:12,809 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 273 transitions, 2349 flow [2024-06-27 17:33:12,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 17:33:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:33:12,810 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, 1, 1, 1, 1] [2024-06-27 17:33:12,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:33:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:33:13,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === 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 17:33:13,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:33:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash 521217783, now seen corresponding path program 1 times [2024-06-27 17:33:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:33:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177822192] [2024-06-27 17:33:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:33:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:33:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:33:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:33:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:33:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177822192] [2024-06-27 17:33:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177822192] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:33:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621267465] [2024-06-27 17:33:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:33:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:33:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:33:15,722 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 17:33:15,723 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 17:33:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:33:15,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 17:33:15,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:33:15,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:33:15,931 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 17:33:15,987 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-06-27 17:33:15,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-06-27 17:33:16,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:33:16,074 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:33:16,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:33:16,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:33:16,538 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2024-06-27 17:33:16,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2024-06-27 17:33:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:33:16,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:33:17,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:33:17,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 113 [2024-06-27 17:33:17,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:33:17,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2226 treesize of output 2158 [2024-06-27 17:33:18,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:33:18,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1138 treesize of output 1210 [2024-06-27 17:33:18,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:33:18,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 994 treesize of output 922