./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/mult-flipped-dist.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 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:29:38,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:29:38,587 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:29:38,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:29:38,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:29:38,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:29:38,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:29:38,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:29:38,617 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:29:38,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:29:38,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:29:38,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:29:38,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:29:38,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:29:38,622 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:29:38,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:29:38,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:29:38,623 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:29:38,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:29:38,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:29:38,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:29:38,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:29:38,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:29:38,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:29:38,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:29:38,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:29:38,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:29:38,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:38,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:29:38,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:29:38,629 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:29:38,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:29:38,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:29:38,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc [2024-01-27 15:29:38,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:29:38,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:29:38,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:29:38,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:29:38,842 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:29:38,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-01-27 15:29:39,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:29:39,907 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:29:39,908 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-01-27 15:29:39,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6a07996/82f6c3afc66648dd8049ed050da0c907/FLAG202189267 [2024-01-27 15:29:39,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6a07996/82f6c3afc66648dd8049ed050da0c907 [2024-01-27 15:29:39,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:29:39,925 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:29:39,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:39,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:29:39,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:29:39,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:39" (1/1) ... [2024-01-27 15:29:39,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278cc0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:39, skipping insertion in model container [2024-01-27 15:29:39,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:39" (1/1) ... [2024-01-27 15:29:39,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:29:40,157 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-01-27 15:29:40,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:40,171 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:29:40,204 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-01-27 15:29:40,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:40,223 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:29:40,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40 WrapperNode [2024-01-27 15:29:40,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:40,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:40,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:29:40,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:29:40,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,248 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2024-01-27 15:29:40,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:40,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:29:40,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:29:40,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:29:40,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,278 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:29:40,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:29:40,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:29:40,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:29:40,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:29:40,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (1/1) ... [2024-01-27 15:29:40,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:40,327 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) [2024-01-27 15:29:40,331 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 [2024-01-27 15:29:40,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:29:40,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:29:40,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:29:40,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:29:40,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:29:40,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:29:40,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:29:40,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:29:40,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:29:40,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:29:40,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:29:40,367 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:29:40,446 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:29:40,448 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:29:40,590 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:29:40,590 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:29:40,697 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:29:40,697 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:29:40,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:40 BoogieIcfgContainer [2024-01-27 15:29:40,698 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:29:40,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:29:40,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:29:40,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:29:40,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:29:39" (1/3) ... [2024-01-27 15:29:40,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48314159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:40, skipping insertion in model container [2024-01-27 15:29:40,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:40" (2/3) ... [2024-01-27 15:29:40,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48314159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:40, skipping insertion in model container [2024-01-27 15:29:40,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:40" (3/3) ... [2024-01-27 15:29:40,703 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2024-01-27 15:29:40,710 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:29:40,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:29:40,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:29:40,717 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:29:40,775 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:29:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 75 flow [2024-01-27 15:29:40,823 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-27 15:29:40,823 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:29:40,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 3/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-27 15:29:40,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 75 flow [2024-01-27 15:29:40,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2024-01-27 15:29:40,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:29:40,841 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;@3333e03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:29:40,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:29:40,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:29:40,848 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-01-27 15:29:40,848 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:29:40,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:40,855 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] [2024-01-27 15:29:40,856 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 1 more)] === [2024-01-27 15:29:40,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -625144747, now seen corresponding path program 1 times [2024-01-27 15:29:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69220524] [2024-01-27 15:29:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:41,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69220524] [2024-01-27 15:29:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69220524] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:41,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:41,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:29:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578068920] [2024-01-27 15:29:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:29:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:29:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:29:41,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:41,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:41,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:41,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:41,608 INFO L124 PetriNetUnfolderBase]: 428/631 cut-off events. [2024-01-27 15:29:41,608 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-01-27 15:29:41,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 631 events. 428/631 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2018 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2024-01-27 15:29:41,616 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2024-01-27 15:29:41,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 199 flow [2024-01-27 15:29:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:29:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:29:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-27 15:29:41,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-27 15:29:41,628 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-27 15:29:41,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 199 flow [2024-01-27 15:29:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:29:41,634 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2024-01-27 15:29:41,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2024-01-27 15:29:41,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-01-27 15:29:41,638 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2024-01-27 15:29:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:41,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:41,638 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] [2024-01-27 15:29:41,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:29:41,639 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 1 more)] === [2024-01-27 15:29:41,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -473683088, now seen corresponding path program 1 times [2024-01-27 15:29:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989944665] [2024-01-27 15:29:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:41,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:41,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989944665] [2024-01-27 15:29:41,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989944665] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:41,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:41,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311141448] [2024-01-27 15:29:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:41,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:41,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:41,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:41,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:41,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:42,013 INFO L124 PetriNetUnfolderBase]: 535/825 cut-off events. [2024-01-27 15:29:42,014 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-01-27 15:29:42,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 825 events. 535/825 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3134 event pairs, 158 based on Foata normal form. 86/911 useless extension candidates. Maximal degree in co-relation 562. Up to 394 conditions per place. [2024-01-27 15:29:42,020 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 52 selfloop transitions, 6 changer transitions 5/64 dead transitions. [2024-01-27 15:29:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 64 transitions, 303 flow [2024-01-27 15:29:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-01-27 15:29:42,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-01-27 15:29:42,023 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 5 states and 82 transitions. [2024-01-27 15:29:42,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 64 transitions, 303 flow [2024-01-27 15:29:42,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 64 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:42,029 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 129 flow [2024-01-27 15:29:42,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-27 15:29:42,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-01-27 15:29:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 129 flow [2024-01-27 15:29:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:42,031 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] [2024-01-27 15:29:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:29:42,031 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 1 more)] === [2024-01-27 15:29:42,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1103395421, now seen corresponding path program 1 times [2024-01-27 15:29:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:42,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283611734] [2024-01-27 15:29:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:42,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283611734] [2024-01-27 15:29:42,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283611734] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:42,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:42,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:29:42,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34584100] [2024-01-27 15:29:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:42,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:42,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:42,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:42,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:42,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:42,224 INFO L124 PetriNetUnfolderBase]: 603/931 cut-off events. [2024-01-27 15:29:42,224 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2024-01-27 15:29:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 931 events. 603/931 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3595 event pairs, 159 based on Foata normal form. 46/977 useless extension candidates. Maximal degree in co-relation 871. Up to 522 conditions per place. [2024-01-27 15:29:42,228 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 45 selfloop transitions, 5 changer transitions 10/61 dead transitions. [2024-01-27 15:29:42,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 61 transitions, 363 flow [2024-01-27 15:29:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:29:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:29:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-01-27 15:29:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-01-27 15:29:42,230 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 129 flow. Second operand 4 states and 70 transitions. [2024-01-27 15:29:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 61 transitions, 363 flow [2024-01-27 15:29:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 61 transitions, 351 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:42,232 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 145 flow [2024-01-27 15:29:42,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-01-27 15:29:42,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-01-27 15:29:42,233 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 145 flow [2024-01-27 15:29:42,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:42,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:29:42,234 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 1 more)] === [2024-01-27 15:29:42,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2068831899, now seen corresponding path program 2 times [2024-01-27 15:29:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005477024] [2024-01-27 15:29:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:42,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005477024] [2024-01-27 15:29:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005477024] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:42,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616111897] [2024-01-27 15:29:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:42,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:42,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:42,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:42,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:42,421 INFO L124 PetriNetUnfolderBase]: 640/974 cut-off events. [2024-01-27 15:29:42,421 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2024-01-27 15:29:42,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3335 conditions, 974 events. 640/974 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3711 event pairs, 291 based on Foata normal form. 16/990 useless extension candidates. Maximal degree in co-relation 1355. Up to 742 conditions per place. [2024-01-27 15:29:42,426 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 47 selfloop transitions, 14 changer transitions 3/65 dead transitions. [2024-01-27 15:29:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 464 flow [2024-01-27 15:29:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-01-27 15:29:42,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-01-27 15:29:42,427 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 145 flow. Second operand 5 states and 73 transitions. [2024-01-27 15:29:42,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 464 flow [2024-01-27 15:29:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 450 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:42,431 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 276 flow [2024-01-27 15:29:42,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-01-27 15:29:42,432 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-01-27 15:29:42,432 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 276 flow [2024-01-27 15:29:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:42,432 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] [2024-01-27 15:29:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:29:42,433 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 1 more)] === [2024-01-27 15:29:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 143959159, now seen corresponding path program 3 times [2024-01-27 15:29:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739053256] [2024-01-27 15:29:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:42,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739053256] [2024-01-27 15:29:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739053256] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:42,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:42,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:29:42,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508209875] [2024-01-27 15:29:42,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:42,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:42,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:42,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:42,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:42,630 INFO L124 PetriNetUnfolderBase]: 798/1208 cut-off events. [2024-01-27 15:29:42,631 INFO L125 PetriNetUnfolderBase]: For 3955/3955 co-relation queries the response was YES. [2024-01-27 15:29:42,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4982 conditions, 1208 events. 798/1208 cut-off events. For 3955/3955 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4789 event pairs, 249 based on Foata normal form. 42/1250 useless extension candidates. Maximal degree in co-relation 3303. Up to 775 conditions per place. [2024-01-27 15:29:42,637 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 47 selfloop transitions, 20 changer transitions 6/74 dead transitions. [2024-01-27 15:29:42,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 74 transitions, 623 flow [2024-01-27 15:29:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:29:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:29:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-01-27 15:29:42,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-01-27 15:29:42,638 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 276 flow. Second operand 4 states and 64 transitions. [2024-01-27 15:29:42,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 74 transitions, 623 flow [2024-01-27 15:29:42,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 579 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:42,645 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 404 flow [2024-01-27 15:29:42,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2024-01-27 15:29:42,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-01-27 15:29:42,646 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 404 flow [2024-01-27 15:29:42,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:42,646 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] [2024-01-27 15:29:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:29:42,647 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 1 more)] === [2024-01-27 15:29:42,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1093839571, now seen corresponding path program 4 times [2024-01-27 15:29:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465856802] [2024-01-27 15:29:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:42,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:42,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465856802] [2024-01-27 15:29:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465856802] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:42,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:42,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147226820] [2024-01-27 15:29:42,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:42,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:42,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:42,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:42,845 INFO L124 PetriNetUnfolderBase]: 758/1168 cut-off events. [2024-01-27 15:29:42,845 INFO L125 PetriNetUnfolderBase]: For 5017/5017 co-relation queries the response was YES. [2024-01-27 15:29:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5214 conditions, 1168 events. 758/1168 cut-off events. For 5017/5017 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4725 event pairs, 248 based on Foata normal form. 22/1190 useless extension candidates. Maximal degree in co-relation 4140. Up to 644 conditions per place. [2024-01-27 15:29:42,852 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 45 selfloop transitions, 12 changer transitions 20/78 dead transitions. [2024-01-27 15:29:42,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 78 transitions, 669 flow [2024-01-27 15:29:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-01-27 15:29:42,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-01-27 15:29:42,853 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 404 flow. Second operand 5 states and 77 transitions. [2024-01-27 15:29:42,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 78 transitions, 669 flow [2024-01-27 15:29:42,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 634 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:42,861 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 397 flow [2024-01-27 15:29:42,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-01-27 15:29:42,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-01-27 15:29:42,862 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 397 flow [2024-01-27 15:29:42,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:42,863 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] [2024-01-27 15:29:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:29:42,863 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 1 more)] === [2024-01-27 15:29:42,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1907583796, now seen corresponding path program 2 times [2024-01-27 15:29:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823128308] [2024-01-27 15:29:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:42,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:42,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:42,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823128308] [2024-01-27 15:29:42,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823128308] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:42,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:29:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972995131] [2024-01-27 15:29:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:42,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:42,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:42,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:42,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:42,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:43,041 INFO L124 PetriNetUnfolderBase]: 758/1139 cut-off events. [2024-01-27 15:29:43,041 INFO L125 PetriNetUnfolderBase]: For 5548/5548 co-relation queries the response was YES. [2024-01-27 15:29:43,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5307 conditions, 1139 events. 758/1139 cut-off events. For 5548/5548 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4424 event pairs, 136 based on Foata normal form. 32/1171 useless extension candidates. Maximal degree in co-relation 2344. Up to 864 conditions per place. [2024-01-27 15:29:43,048 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 59 selfloop transitions, 12 changer transitions 3/75 dead transitions. [2024-01-27 15:29:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 756 flow [2024-01-27 15:29:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:29:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:29:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-01-27 15:29:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-01-27 15:29:43,049 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 397 flow. Second operand 4 states and 64 transitions. [2024-01-27 15:29:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 756 flow [2024-01-27 15:29:43,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 716 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:43,055 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 450 flow [2024-01-27 15:29:43,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-01-27 15:29:43,056 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-01-27 15:29:43,057 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 450 flow [2024-01-27 15:29:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:43,057 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] [2024-01-27 15:29:43,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:29:43,057 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 1 more)] === [2024-01-27 15:29:43,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1230055696, now seen corresponding path program 3 times [2024-01-27 15:29:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:43,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111624332] [2024-01-27 15:29:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:43,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:43,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111624332] [2024-01-27 15:29:43,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111624332] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:43,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:43,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:43,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069835073] [2024-01-27 15:29:43,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:43,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:43,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:43,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:43,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:43,310 INFO L124 PetriNetUnfolderBase]: 844/1281 cut-off events. [2024-01-27 15:29:43,311 INFO L125 PetriNetUnfolderBase]: For 7405/7405 co-relation queries the response was YES. [2024-01-27 15:29:43,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6023 conditions, 1281 events. 844/1281 cut-off events. For 7405/7405 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5205 event pairs, 260 based on Foata normal form. 34/1315 useless extension candidates. Maximal degree in co-relation 4150. Up to 744 conditions per place. [2024-01-27 15:29:43,317 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 59 selfloop transitions, 21 changer transitions 9/90 dead transitions. [2024-01-27 15:29:43,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 928 flow [2024-01-27 15:29:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-01-27 15:29:43,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-01-27 15:29:43,318 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 450 flow. Second operand 5 states and 70 transitions. [2024-01-27 15:29:43,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 928 flow [2024-01-27 15:29:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 900 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:43,326 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 620 flow [2024-01-27 15:29:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=620, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2024-01-27 15:29:43,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-01-27 15:29:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 620 flow [2024-01-27 15:29:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:43,327 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] [2024-01-27 15:29:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:29:43,327 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 1 more)] === [2024-01-27 15:29:43,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash 210997426, now seen corresponding path program 4 times [2024-01-27 15:29:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:43,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625409288] [2024-01-27 15:29:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:43,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625409288] [2024-01-27 15:29:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625409288] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:43,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:43,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:29:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945430364] [2024-01-27 15:29:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:43,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:43,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 620 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:43,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:43,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:43,516 INFO L124 PetriNetUnfolderBase]: 838/1226 cut-off events. [2024-01-27 15:29:43,517 INFO L125 PetriNetUnfolderBase]: For 8529/8529 co-relation queries the response was YES. [2024-01-27 15:29:43,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 1226 events. 838/1226 cut-off events. For 8529/8529 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4634 event pairs, 257 based on Foata normal form. 24/1250 useless extension candidates. Maximal degree in co-relation 5379. Up to 841 conditions per place. [2024-01-27 15:29:43,525 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 64 selfloop transitions, 28 changer transitions 1/94 dead transitions. [2024-01-27 15:29:43,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 1162 flow [2024-01-27 15:29:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:29:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:29:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-01-27 15:29:43,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-27 15:29:43,527 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 620 flow. Second operand 4 states and 62 transitions. [2024-01-27 15:29:43,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 1162 flow [2024-01-27 15:29:43,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 94 transitions, 1114 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:43,536 INFO L231 Difference]: Finished difference. Result has 55 places, 72 transitions, 870 flow [2024-01-27 15:29:43,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=55, PETRI_TRANSITIONS=72} [2024-01-27 15:29:43,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-01-27 15:29:43,537 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 72 transitions, 870 flow [2024-01-27 15:29:43,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:43,538 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] [2024-01-27 15:29:43,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:29:43,538 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 1 more)] === [2024-01-27 15:29:43,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1368455834, now seen corresponding path program 1 times [2024-01-27 15:29:43,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:43,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353402913] [2024-01-27 15:29:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:43,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353402913] [2024-01-27 15:29:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353402913] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:43,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797610956] [2024-01-27 15:29:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:43,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:43,638 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) [2024-01-27 15:29:43,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:29:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:43,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:29:43,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:43,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:43,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797610956] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:43,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:43,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-01-27 15:29:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337527962] [2024-01-27 15:29:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:29:43,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:43,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 72 transitions, 870 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:43,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:43,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:43,960 INFO L124 PetriNetUnfolderBase]: 935/1343 cut-off events. [2024-01-27 15:29:43,960 INFO L125 PetriNetUnfolderBase]: For 10819/10819 co-relation queries the response was YES. [2024-01-27 15:29:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8087 conditions, 1343 events. 935/1343 cut-off events. For 10819/10819 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5063 event pairs, 105 based on Foata normal form. 48/1391 useless extension candidates. Maximal degree in co-relation 5644. Up to 1044 conditions per place. [2024-01-27 15:29:43,970 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 80 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-01-27 15:29:43,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 103 transitions, 1342 flow [2024-01-27 15:29:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:29:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:29:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-27 15:29:43,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-27 15:29:43,972 INFO L175 Difference]: Start difference. First operand has 55 places, 72 transitions, 870 flow. Second operand 4 states and 63 transitions. [2024-01-27 15:29:43,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 103 transitions, 1342 flow [2024-01-27 15:29:43,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 103 transitions, 1268 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:43,983 INFO L231 Difference]: Finished difference. Result has 57 places, 78 transitions, 954 flow [2024-01-27 15:29:43,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=954, PETRI_PLACES=57, PETRI_TRANSITIONS=78} [2024-01-27 15:29:43,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-01-27 15:29:43,984 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 78 transitions, 954 flow [2024-01-27 15:29:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:43,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:43,985 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] [2024-01-27 15:29:43,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:29:44,201 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 1 more)] === [2024-01-27 15:29:44,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash -936030562, now seen corresponding path program 2 times [2024-01-27 15:29:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137274627] [2024-01-27 15:29:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:44,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:44,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137274627] [2024-01-27 15:29:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137274627] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:44,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468923902] [2024-01-27 15:29:44,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:44,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:44,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:44,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 78 transitions, 954 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-01-27 15:29:44,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:44,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:44,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:44,428 INFO L124 PetriNetUnfolderBase]: 988/1422 cut-off events. [2024-01-27 15:29:44,429 INFO L125 PetriNetUnfolderBase]: For 13185/13185 co-relation queries the response was YES. [2024-01-27 15:29:44,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8856 conditions, 1422 events. 988/1422 cut-off events. For 13185/13185 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5472 event pairs, 248 based on Foata normal form. 12/1434 useless extension candidates. Maximal degree in co-relation 6224. Up to 942 conditions per place. [2024-01-27 15:29:44,438 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 83 selfloop transitions, 29 changer transitions 4/117 dead transitions. [2024-01-27 15:29:44,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 117 transitions, 1667 flow [2024-01-27 15:29:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:29:44,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-27 15:29:44,439 INFO L175 Difference]: Start difference. First operand has 57 places, 78 transitions, 954 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:29:44,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 117 transitions, 1667 flow [2024-01-27 15:29:44,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 117 transitions, 1632 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:44,450 INFO L231 Difference]: Finished difference. Result has 63 places, 93 transitions, 1263 flow [2024-01-27 15:29:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1263, PETRI_PLACES=63, PETRI_TRANSITIONS=93} [2024-01-27 15:29:44,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-01-27 15:29:44,451 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 93 transitions, 1263 flow [2024-01-27 15:29:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-01-27 15:29:44,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:44,452 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] [2024-01-27 15:29:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:29:44,452 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 1 more)] === [2024-01-27 15:29:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 589571412, now seen corresponding path program 3 times [2024-01-27 15:29:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167673177] [2024-01-27 15:29:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:44,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167673177] [2024-01-27 15:29:44,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167673177] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719457941] [2024-01-27 15:29:44,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:44,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:44,546 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) [2024-01-27 15:29:44,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:29:44,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:29:44,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:44,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:29:44,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:44,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719457941] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-27 15:29:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586519185] [2024-01-27 15:29:44,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:29:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:29:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:29:44,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:44,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 93 transitions, 1263 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2024-01-27 15:29:44,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:44,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:44,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:44,933 INFO L124 PetriNetUnfolderBase]: 1232/1766 cut-off events. [2024-01-27 15:29:44,934 INFO L125 PetriNetUnfolderBase]: For 18471/18471 co-relation queries the response was YES. [2024-01-27 15:29:44,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12019 conditions, 1766 events. 1232/1766 cut-off events. For 18471/18471 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6940 event pairs, 273 based on Foata normal form. 54/1820 useless extension candidates. Maximal degree in co-relation 10714. Up to 1197 conditions per place. [2024-01-27 15:29:44,945 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 90 selfloop transitions, 70 changer transitions 0/161 dead transitions. [2024-01-27 15:29:44,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 161 transitions, 2422 flow [2024-01-27 15:29:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:29:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:29:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-01-27 15:29:44,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-01-27 15:29:44,946 INFO L175 Difference]: Start difference. First operand has 63 places, 93 transitions, 1263 flow. Second operand 6 states and 85 transitions. [2024-01-27 15:29:44,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 161 transitions, 2422 flow [2024-01-27 15:29:44,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 161 transitions, 2370 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:44,962 INFO L231 Difference]: Finished difference. Result has 69 places, 130 transitions, 2076 flow [2024-01-27 15:29:44,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2076, PETRI_PLACES=69, PETRI_TRANSITIONS=130} [2024-01-27 15:29:44,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-01-27 15:29:44,963 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 130 transitions, 2076 flow [2024-01-27 15:29:44,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2024-01-27 15:29:44,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:44,963 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] [2024-01-27 15:29:44,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:45,174 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,SelfDestructingSolverStorable11 [2024-01-27 15:29:45,174 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash 844109942, now seen corresponding path program 4 times [2024-01-27 15:29:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238349689] [2024-01-27 15:29:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:45,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:45,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238349689] [2024-01-27 15:29:45,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238349689] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:45,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:45,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:29:45,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311911040] [2024-01-27 15:29:45,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:45,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:29:45,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:29:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:29:45,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:45,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 130 transitions, 2076 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-01-27 15:29:45,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:45,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:45,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:45,478 INFO L124 PetriNetUnfolderBase]: 1219/1759 cut-off events. [2024-01-27 15:29:45,478 INFO L125 PetriNetUnfolderBase]: For 22160/22160 co-relation queries the response was YES. [2024-01-27 15:29:45,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12992 conditions, 1759 events. 1219/1759 cut-off events. For 22160/22160 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6945 event pairs, 314 based on Foata normal form. 22/1781 useless extension candidates. Maximal degree in co-relation 11342. Up to 1162 conditions per place. [2024-01-27 15:29:45,493 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 109 selfloop transitions, 35 changer transitions 8/153 dead transitions. [2024-01-27 15:29:45,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 2616 flow [2024-01-27 15:29:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-27 15:29:45,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-01-27 15:29:45,495 INFO L175 Difference]: Start difference. First operand has 69 places, 130 transitions, 2076 flow. Second operand 5 states and 64 transitions. [2024-01-27 15:29:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 2616 flow [2024-01-27 15:29:45,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 153 transitions, 2572 flow, removed 22 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:45,523 INFO L231 Difference]: Finished difference. Result has 75 places, 128 transitions, 2106 flow [2024-01-27 15:29:45,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2106, PETRI_PLACES=75, PETRI_TRANSITIONS=128} [2024-01-27 15:29:45,524 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-01-27 15:29:45,524 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 128 transitions, 2106 flow [2024-01-27 15:29:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-01-27 15:29:45,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:45,524 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] [2024-01-27 15:29:45,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:29:45,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:45,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash -213086334, now seen corresponding path program 1 times [2024-01-27 15:29:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393441392] [2024-01-27 15:29:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393441392] [2024-01-27 15:29:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393441392] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305448897] [2024-01-27 15:29:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:45,709 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) [2024-01-27 15:29:45,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:29:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:45,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:45,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:45,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:46,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305448897] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:46,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:46,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-01-27 15:29:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817738864] [2024-01-27 15:29:46,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:46,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:29:46,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:29:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:29:46,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:46,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 128 transitions, 2106 flow. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:46,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:46,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:46,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:46,757 INFO L124 PetriNetUnfolderBase]: 1765/2555 cut-off events. [2024-01-27 15:29:46,757 INFO L125 PetriNetUnfolderBase]: For 30324/30324 co-relation queries the response was YES. [2024-01-27 15:29:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18185 conditions, 2555 events. 1765/2555 cut-off events. For 30324/30324 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10650 event pairs, 205 based on Foata normal form. 2/2557 useless extension candidates. Maximal degree in co-relation 15826. Up to 1849 conditions per place. [2024-01-27 15:29:46,775 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 159 selfloop transitions, 66 changer transitions 2/228 dead transitions. [2024-01-27 15:29:46,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 228 transitions, 3427 flow [2024-01-27 15:29:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-01-27 15:29:46,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-01-27 15:29:46,776 INFO L175 Difference]: Start difference. First operand has 75 places, 128 transitions, 2106 flow. Second operand 9 states and 147 transitions. [2024-01-27 15:29:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 228 transitions, 3427 flow [2024-01-27 15:29:46,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 228 transitions, 3307 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-01-27 15:29:46,806 INFO L231 Difference]: Finished difference. Result has 81 places, 164 transitions, 2801 flow [2024-01-27 15:29:46,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2801, PETRI_PLACES=81, PETRI_TRANSITIONS=164} [2024-01-27 15:29:46,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-01-27 15:29:46,807 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 164 transitions, 2801 flow [2024-01-27 15:29:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:46,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:46,807 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] [2024-01-27 15:29:46,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:47,019 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:47,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1074837572, now seen corresponding path program 2 times [2024-01-27 15:29:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681854607] [2024-01-27 15:29:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681854607] [2024-01-27 15:29:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681854607] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644747652] [2024-01-27 15:29:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:47,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:47,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:47,176 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) [2024-01-27 15:29:47,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:29:47,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:47,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:47,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:47,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644747652] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:47,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:47,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-01-27 15:29:47,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960970110] [2024-01-27 15:29:47,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:47,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:29:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:29:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:29:47,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:47,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 164 transitions, 2801 flow. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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) [2024-01-27 15:29:47,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:47,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:47,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:48,188 INFO L124 PetriNetUnfolderBase]: 2117/3075 cut-off events. [2024-01-27 15:29:48,188 INFO L125 PetriNetUnfolderBase]: For 38390/38390 co-relation queries the response was YES. [2024-01-27 15:29:48,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22260 conditions, 3075 events. 2117/3075 cut-off events. For 38390/38390 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13204 event pairs, 359 based on Foata normal form. 2/3077 useless extension candidates. Maximal degree in co-relation 21454. Up to 2407 conditions per place. [2024-01-27 15:29:48,210 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 174 selfloop transitions, 66 changer transitions 2/243 dead transitions. [2024-01-27 15:29:48,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 243 transitions, 3883 flow [2024-01-27 15:29:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-01-27 15:29:48,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588477366255144 [2024-01-27 15:29:48,212 INFO L175 Difference]: Start difference. First operand has 81 places, 164 transitions, 2801 flow. Second operand 9 states and 143 transitions. [2024-01-27 15:29:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 243 transitions, 3883 flow [2024-01-27 15:29:48,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 243 transitions, 3695 flow, removed 94 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:48,255 INFO L231 Difference]: Finished difference. Result has 92 places, 183 transitions, 3113 flow [2024-01-27 15:29:48,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3113, PETRI_PLACES=92, PETRI_TRANSITIONS=183} [2024-01-27 15:29:48,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-01-27 15:29:48,256 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 183 transitions, 3113 flow [2024-01-27 15:29:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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) [2024-01-27 15:29:48,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:48,256 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] [2024-01-27 15:29:48,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:48,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:29:48,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:48,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1981082150, now seen corresponding path program 3 times [2024-01-27 15:29:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:48,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712951963] [2024-01-27 15:29:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:48,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712951963] [2024-01-27 15:29:48,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712951963] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571037603] [2024-01-27 15:29:48,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:48,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:48,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:48,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:29:48,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:29:48,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:48,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:48,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:48,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:49,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571037603] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:49,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:49,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-01-27 15:29:49,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465972976] [2024-01-27 15:29:49,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:29:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:29:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:29:49,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:49,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 183 transitions, 3113 flow. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 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) [2024-01-27 15:29:49,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:49,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:49,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:49,585 INFO L124 PetriNetUnfolderBase]: 2627/3825 cut-off events. [2024-01-27 15:29:49,586 INFO L125 PetriNetUnfolderBase]: For 49077/49077 co-relation queries the response was YES. [2024-01-27 15:29:49,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27621 conditions, 3825 events. 2627/3825 cut-off events. For 49077/49077 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17157 event pairs, 557 based on Foata normal form. 2/3827 useless extension candidates. Maximal degree in co-relation 26935. Up to 3169 conditions per place. [2024-01-27 15:29:49,619 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 212 selfloop transitions, 70 changer transitions 2/285 dead transitions. [2024-01-27 15:29:49,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 285 transitions, 4786 flow [2024-01-27 15:29:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-01-27 15:29:49,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588477366255144 [2024-01-27 15:29:49,620 INFO L175 Difference]: Start difference. First operand has 92 places, 183 transitions, 3113 flow. Second operand 9 states and 143 transitions. [2024-01-27 15:29:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 285 transitions, 4786 flow [2024-01-27 15:29:49,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 285 transitions, 4580 flow, removed 75 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:49,685 INFO L231 Difference]: Finished difference. Result has 102 places, 223 transitions, 3933 flow [2024-01-27 15:29:49,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3933, PETRI_PLACES=102, PETRI_TRANSITIONS=223} [2024-01-27 15:29:49,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-01-27 15:29:49,686 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 223 transitions, 3933 flow [2024-01-27 15:29:49,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 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) [2024-01-27 15:29:49,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:49,687 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] [2024-01-27 15:29:49,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:29:49,893 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:49,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash -300585510, now seen corresponding path program 4 times [2024-01-27 15:29:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:49,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146583326] [2024-01-27 15:29:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:50,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146583326] [2024-01-27 15:29:50,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146583326] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:50,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669843326] [2024-01-27 15:29:50,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:50,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:50,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:29:50,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:50,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:50,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:50,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:50,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669843326] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:50,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:50,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-01-27 15:29:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297428251] [2024-01-27 15:29:50,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:29:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:29:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:29:50,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:50,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 223 transitions, 3933 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 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) [2024-01-27 15:29:50,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:50,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:51,101 INFO L124 PetriNetUnfolderBase]: 2947/4297 cut-off events. [2024-01-27 15:29:51,102 INFO L125 PetriNetUnfolderBase]: For 57174/57174 co-relation queries the response was YES. [2024-01-27 15:29:51,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31324 conditions, 4297 events. 2947/4297 cut-off events. For 57174/57174 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19717 event pairs, 709 based on Foata normal form. 2/4299 useless extension candidates. Maximal degree in co-relation 30629. Up to 3719 conditions per place. [2024-01-27 15:29:51,139 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 225 selfloop transitions, 70 changer transitions 2/298 dead transitions. [2024-01-27 15:29:51,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 298 transitions, 5253 flow [2024-01-27 15:29:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-01-27 15:29:51,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637860082304527 [2024-01-27 15:29:51,140 INFO L175 Difference]: Start difference. First operand has 102 places, 223 transitions, 3933 flow. Second operand 9 states and 137 transitions. [2024-01-27 15:29:51,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 298 transitions, 5253 flow [2024-01-27 15:29:51,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 298 transitions, 4949 flow, removed 137 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:51,289 INFO L231 Difference]: Finished difference. Result has 112 places, 242 transitions, 4211 flow [2024-01-27 15:29:51,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4211, PETRI_PLACES=112, PETRI_TRANSITIONS=242} [2024-01-27 15:29:51,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-01-27 15:29:51,289 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 242 transitions, 4211 flow [2024-01-27 15:29:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 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) [2024-01-27 15:29:51,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:51,290 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] [2024-01-27 15:29:51,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:29:51,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:51,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1437228506, now seen corresponding path program 5 times [2024-01-27 15:29:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:51,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456450569] [2024-01-27 15:29:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456450569] [2024-01-27 15:29:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456450569] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661804792] [2024-01-27 15:29:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:51,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:51,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:51,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:29:51,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:29:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:51,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:51,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:51,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661804792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:52,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-01-27 15:29:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86893564] [2024-01-27 15:29:52,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:52,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:29:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:29:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:29:52,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:52,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 242 transitions, 4211 flow. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 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) [2024-01-27 15:29:52,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:52,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:52,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:53,366 INFO L124 PetriNetUnfolderBase]: 3377/4923 cut-off events. [2024-01-27 15:29:53,366 INFO L125 PetriNetUnfolderBase]: For 63520/63520 co-relation queries the response was YES. [2024-01-27 15:29:53,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35700 conditions, 4923 events. 3377/4923 cut-off events. For 63520/63520 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23189 event pairs, 849 based on Foata normal form. 2/4925 useless extension candidates. Maximal degree in co-relation 34961. Up to 4369 conditions per place. [2024-01-27 15:29:53,406 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 261 selfloop transitions, 66 changer transitions 2/330 dead transitions. [2024-01-27 15:29:53,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 330 transitions, 5898 flow [2024-01-27 15:29:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-01-27 15:29:53,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:29:53,408 INFO L175 Difference]: Start difference. First operand has 112 places, 242 transitions, 4211 flow. Second operand 9 states and 135 transitions. [2024-01-27 15:29:53,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 330 transitions, 5898 flow [2024-01-27 15:29:53,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 330 transitions, 5640 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:53,502 INFO L231 Difference]: Finished difference. Result has 122 places, 278 transitions, 4914 flow [2024-01-27 15:29:53,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4914, PETRI_PLACES=122, PETRI_TRANSITIONS=278} [2024-01-27 15:29:53,503 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-01-27 15:29:53,503 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 278 transitions, 4914 flow [2024-01-27 15:29:53,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 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) [2024-01-27 15:29:53,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:53,503 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] [2024-01-27 15:29:53,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:53,714 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash 101511382, now seen corresponding path program 6 times [2024-01-27 15:29:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659866919] [2024-01-27 15:29:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:53,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659866919] [2024-01-27 15:29:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659866919] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072332448] [2024-01-27 15:29:53,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:29:53,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:53,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:53,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:53,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:29:53,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:29:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:53,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:53,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:54,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072332448] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:54,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-01-27 15:29:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396297033] [2024-01-27 15:29:54,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:29:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:29:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:29:54,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:54,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 278 transitions, 4914 flow. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 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) [2024-01-27 15:29:54,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:54,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:54,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:55,553 INFO L124 PetriNetUnfolderBase]: 3729/5443 cut-off events. [2024-01-27 15:29:55,554 INFO L125 PetriNetUnfolderBase]: For 71779/71779 co-relation queries the response was YES. [2024-01-27 15:29:55,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39731 conditions, 5443 events. 3729/5443 cut-off events. For 71779/71779 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26194 event pairs, 1015 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 38983. Up to 4847 conditions per place. [2024-01-27 15:29:55,599 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 282 selfloop transitions, 66 changer transitions 2/351 dead transitions. [2024-01-27 15:29:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 351 transitions, 6366 flow [2024-01-27 15:29:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-01-27 15:29:55,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637860082304527 [2024-01-27 15:29:55,601 INFO L175 Difference]: Start difference. First operand has 122 places, 278 transitions, 4914 flow. Second operand 9 states and 137 transitions. [2024-01-27 15:29:55,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 351 transitions, 6366 flow [2024-01-27 15:29:55,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 351 transitions, 6022 flow, removed 157 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:55,717 INFO L231 Difference]: Finished difference. Result has 132 places, 297 transitions, 5197 flow [2024-01-27 15:29:55,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5197, PETRI_PLACES=132, PETRI_TRANSITIONS=297} [2024-01-27 15:29:55,718 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-01-27 15:29:55,718 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 297 transitions, 5197 flow [2024-01-27 15:29:55,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 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) [2024-01-27 15:29:55,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:55,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:55,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:55,930 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -632104818, now seen corresponding path program 7 times [2024-01-27 15:29:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:55,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165862791] [2024-01-27 15:29:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165862791] [2024-01-27 15:29:56,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165862791] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348327145] [2024-01-27 15:29:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:29:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:56,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:56,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:29:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:56,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:29:56,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:56,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348327145] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:56,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:56,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-01-27 15:29:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152769840] [2024-01-27 15:29:56,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:29:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:29:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:29:56,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:56,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 297 transitions, 5197 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 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) [2024-01-27 15:29:56,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:56,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:56,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:57,501 INFO L124 PetriNetUnfolderBase]: 5474/7857 cut-off events. [2024-01-27 15:29:57,501 INFO L125 PetriNetUnfolderBase]: For 115576/115576 co-relation queries the response was YES. [2024-01-27 15:29:57,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56246 conditions, 7857 events. 5474/7857 cut-off events. For 115576/115576 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 38852 event pairs, 531 based on Foata normal form. 54/7911 useless extension candidates. Maximal degree in co-relation 54763. Up to 3225 conditions per place. [2024-01-27 15:29:57,560 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 549 selfloop transitions, 136 changer transitions 0/686 dead transitions. [2024-01-27 15:29:57,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 686 transitions, 12547 flow [2024-01-27 15:29:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:29:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:29:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-01-27 15:29:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612535612535613 [2024-01-27 15:29:57,562 INFO L175 Difference]: Start difference. First operand has 132 places, 297 transitions, 5197 flow. Second operand 13 states and 197 transitions. [2024-01-27 15:29:57,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 686 transitions, 12547 flow [2024-01-27 15:29:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 686 transitions, 11784 flow, removed 352 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:57,707 INFO L231 Difference]: Finished difference. Result has 150 places, 364 transitions, 6386 flow [2024-01-27 15:29:57,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4863, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6386, PETRI_PLACES=150, PETRI_TRANSITIONS=364} [2024-01-27 15:29:57,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-01-27 15:29:57,708 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 364 transitions, 6386 flow [2024-01-27 15:29:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 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) [2024-01-27 15:29:57,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:57,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:57,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:29:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:57,913 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:29:57,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash 172038445, now seen corresponding path program 8 times [2024-01-27 15:29:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735993805] [2024-01-27 15:29:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735993805] [2024-01-27 15:29:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735993805] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436721346] [2024-01-27 15:29:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:58,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:29:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:29:58,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:58,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:29:58,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:58,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:58,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436721346] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:58,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:58,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:29:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840134833] [2024-01-27 15:29:58,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:29:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:29:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:29:58,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:58,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 364 transitions, 6386 flow. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:58,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:58,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:58,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:01,186 INFO L124 PetriNetUnfolderBase]: 7411/10566 cut-off events. [2024-01-27 15:30:01,187 INFO L125 PetriNetUnfolderBase]: For 172200/172200 co-relation queries the response was YES. [2024-01-27 15:30:01,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86383 conditions, 10566 events. 7411/10566 cut-off events. For 172200/172200 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 53994 event pairs, 393 based on Foata normal form. 162/10728 useless extension candidates. Maximal degree in co-relation 83685. Up to 4547 conditions per place. [2024-01-27 15:30:01,265 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 640 selfloop transitions, 514 changer transitions 0/1155 dead transitions. [2024-01-27 15:30:01,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1155 transitions, 20992 flow [2024-01-27 15:30:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-01-27 15:30:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-01-27 15:30:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 646 transitions. [2024-01-27 15:30:01,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435016835016835 [2024-01-27 15:30:01,268 INFO L175 Difference]: Start difference. First operand has 150 places, 364 transitions, 6386 flow. Second operand 55 states and 646 transitions. [2024-01-27 15:30:01,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1155 transitions, 20992 flow [2024-01-27 15:30:01,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1155 transitions, 20199 flow, removed 326 selfloop flow, removed 1 redundant places. [2024-01-27 15:30:01,731 INFO L231 Difference]: Finished difference. Result has 222 places, 715 transitions, 14527 flow [2024-01-27 15:30:01,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=14527, PETRI_PLACES=222, PETRI_TRANSITIONS=715} [2024-01-27 15:30:01,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-01-27 15:30:01,732 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 715 transitions, 14527 flow [2024-01-27 15:30:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:01,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:01,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:01,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-27 15:30:01,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:01,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2104146856, now seen corresponding path program 9 times [2024-01-27 15:30:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363062729] [2024-01-27 15:30:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:02,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363062729] [2024-01-27 15:30:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363062729] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017485578] [2024-01-27 15:30:02,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:30:02,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:02,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:02,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:02,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:30:02,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:30:02,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:02,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:02,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:02,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:02,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017485578] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:02,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:02,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-01-27 15:30:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694263431] [2024-01-27 15:30:02,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:02,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:30:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:30:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:30:02,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:02,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 715 transitions, 14527 flow. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 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) [2024-01-27 15:30:02,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:02,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:02,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:04,860 INFO L124 PetriNetUnfolderBase]: 7704/11077 cut-off events. [2024-01-27 15:30:04,861 INFO L125 PetriNetUnfolderBase]: For 307402/307402 co-relation queries the response was YES. [2024-01-27 15:30:04,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104653 conditions, 11077 events. 7704/11077 cut-off events. For 307402/307402 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 58237 event pairs, 1610 based on Foata normal form. 148/11225 useless extension candidates. Maximal degree in co-relation 103643. Up to 5536 conditions per place. [2024-01-27 15:30:04,966 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 549 selfloop transitions, 368 changer transitions 6/924 dead transitions. [2024-01-27 15:30:04,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 924 transitions, 19436 flow [2024-01-27 15:30:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:30:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:30:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 198 transitions. [2024-01-27 15:30:04,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-27 15:30:04,967 INFO L175 Difference]: Start difference. First operand has 222 places, 715 transitions, 14527 flow. Second operand 15 states and 198 transitions. [2024-01-27 15:30:04,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 924 transitions, 19436 flow [2024-01-27 15:30:06,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 924 transitions, 15781 flow, removed 1636 selfloop flow, removed 2 redundant places. [2024-01-27 15:30:06,973 INFO L231 Difference]: Finished difference. Result has 240 places, 781 transitions, 13304 flow [2024-01-27 15:30:06,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10987, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13304, PETRI_PLACES=240, PETRI_TRANSITIONS=781} [2024-01-27 15:30:06,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-01-27 15:30:06,974 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 781 transitions, 13304 flow [2024-01-27 15:30:06,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 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) [2024-01-27 15:30:06,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:06,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:06,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-27 15:30:07,185 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:07,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash 680037770, now seen corresponding path program 10 times [2024-01-27 15:30:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810911121] [2024-01-27 15:30:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810911121] [2024-01-27 15:30:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810911121] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84244833] [2024-01-27 15:30:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:30:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:07,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:07,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:30:07,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:30:07,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:07,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:07,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:07,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84244833] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:07,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:07,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-27 15:30:07,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149210758] [2024-01-27 15:30:07,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:07,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:30:07,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:07,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:30:07,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:30:07,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:07,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 781 transitions, 13304 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 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) [2024-01-27 15:30:07,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:07,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:10,161 INFO L124 PetriNetUnfolderBase]: 8163/11864 cut-off events. [2024-01-27 15:30:10,161 INFO L125 PetriNetUnfolderBase]: For 365354/365354 co-relation queries the response was YES. [2024-01-27 15:30:10,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105167 conditions, 11864 events. 8163/11864 cut-off events. For 365354/365354 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 64389 event pairs, 1948 based on Foata normal form. 220/12082 useless extension candidates. Maximal degree in co-relation 104275. Up to 6532 conditions per place. [2024-01-27 15:30:10,283 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 667 selfloop transitions, 292 changer transitions 39/999 dead transitions. [2024-01-27 15:30:10,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 999 transitions, 18959 flow [2024-01-27 15:30:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:30:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:30:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-01-27 15:30:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-01-27 15:30:10,285 INFO L175 Difference]: Start difference. First operand has 240 places, 781 transitions, 13304 flow. Second operand 8 states and 125 transitions. [2024-01-27 15:30:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 999 transitions, 18959 flow [2024-01-27 15:30:12,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 999 transitions, 18126 flow, removed 311 selfloop flow, removed 3 redundant places. [2024-01-27 15:30:12,879 INFO L231 Difference]: Finished difference. Result has 248 places, 843 transitions, 14861 flow [2024-01-27 15:30:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12754, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14861, PETRI_PLACES=248, PETRI_TRANSITIONS=843} [2024-01-27 15:30:12,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-01-27 15:30:12,881 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 843 transitions, 14861 flow [2024-01-27 15:30:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 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) [2024-01-27 15:30:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:12,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:12,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:30:13,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:13,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash -668298216, now seen corresponding path program 11 times [2024-01-27 15:30:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030125563] [2024-01-27 15:30:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:13,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:13,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030125563] [2024-01-27 15:30:13,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030125563] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:13,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606526062] [2024-01-27 15:30:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:30:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:13,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:30:13,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:30:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:13,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:13,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:13,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:13,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606526062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:13,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:13,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-01-27 15:30:13,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029275562] [2024-01-27 15:30:13,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:13,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:30:13,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:30:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:30:13,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:13,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 843 transitions, 14861 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-01-27 15:30:13,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:13,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:13,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:16,819 INFO L124 PetriNetUnfolderBase]: 9326/13321 cut-off events. [2024-01-27 15:30:16,819 INFO L125 PetriNetUnfolderBase]: For 469258/469258 co-relation queries the response was YES. [2024-01-27 15:30:16,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127182 conditions, 13321 events. 9326/13321 cut-off events. For 469258/469258 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 71314 event pairs, 1661 based on Foata normal form. 110/13429 useless extension candidates. Maximal degree in co-relation 126535. Up to 8043 conditions per place. [2024-01-27 15:30:16,971 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 672 selfloop transitions, 663 changer transitions 0/1336 dead transitions. [2024-01-27 15:30:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1336 transitions, 26778 flow [2024-01-27 15:30:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:30:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:30:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 390 transitions. [2024-01-27 15:30:16,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-01-27 15:30:16,973 INFO L175 Difference]: Start difference. First operand has 248 places, 843 transitions, 14861 flow. Second operand 32 states and 390 transitions. [2024-01-27 15:30:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1336 transitions, 26778 flow [2024-01-27 15:30:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1336 transitions, 25975 flow, removed 298 selfloop flow, removed 1 redundant places. [2024-01-27 15:30:20,803 INFO L231 Difference]: Finished difference. Result has 286 places, 1117 transitions, 22993 flow [2024-01-27 15:30:20,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=14579, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22993, PETRI_PLACES=286, PETRI_TRANSITIONS=1117} [2024-01-27 15:30:20,805 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-01-27 15:30:20,805 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1117 transitions, 22993 flow [2024-01-27 15:30:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-01-27 15:30:20,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:20,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:20,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:30:21,017 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:21,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -11099450, now seen corresponding path program 12 times [2024-01-27 15:30:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:21,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430993787] [2024-01-27 15:30:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430993787] [2024-01-27 15:30:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430993787] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150040955] [2024-01-27 15:30:21,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:30:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:21,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:21,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:21,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:30:21,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:30:21,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:21,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:21,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:21,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150040955] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:21,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-01-27 15:30:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812607386] [2024-01-27 15:30:21,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:21,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:30:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:30:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:30:21,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:21,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1117 transitions, 22993 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 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) [2024-01-27 15:30:21,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:21,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:21,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:25,318 INFO L124 PetriNetUnfolderBase]: 9461/13622 cut-off events. [2024-01-27 15:30:25,318 INFO L125 PetriNetUnfolderBase]: For 507701/507701 co-relation queries the response was YES. [2024-01-27 15:30:25,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134483 conditions, 13622 events. 9461/13622 cut-off events. For 507701/507701 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 74572 event pairs, 1627 based on Foata normal form. 202/13822 useless extension candidates. Maximal degree in co-relation 133803. Up to 7857 conditions per place. [2024-01-27 15:30:25,464 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 701 selfloop transitions, 617 changer transitions 4/1323 dead transitions. [2024-01-27 15:30:25,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1323 transitions, 27909 flow [2024-01-27 15:30:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:30:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:30:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 308 transitions. [2024-01-27 15:30:25,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562962962962963 [2024-01-27 15:30:25,465 INFO L175 Difference]: Start difference. First operand has 286 places, 1117 transitions, 22993 flow. Second operand 25 states and 308 transitions. [2024-01-27 15:30:25,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1323 transitions, 27909 flow [2024-01-27 15:30:33,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1323 transitions, 23656 flow, removed 1857 selfloop flow, removed 5 redundant places. [2024-01-27 15:30:33,626 INFO L231 Difference]: Finished difference. Result has 308 places, 1121 transitions, 20277 flow [2024-01-27 15:30:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18456, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=20277, PETRI_PLACES=308, PETRI_TRANSITIONS=1121} [2024-01-27 15:30:33,627 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-01-27 15:30:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 1121 transitions, 20277 flow [2024-01-27 15:30:33,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 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) [2024-01-27 15:30:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:33,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:33,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:33,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:33,831 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:33,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2042088402, now seen corresponding path program 13 times [2024-01-27 15:30:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050990786] [2024-01-27 15:30:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:33,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:33,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050990786] [2024-01-27 15:30:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050990786] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:33,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194785939] [2024-01-27 15:30:33,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:30:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:33,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:33,937 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:33,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:30:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:34,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:34,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:30:34,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:30:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194785939] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:34,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-01-27 15:30:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192346956] [2024-01-27 15:30:34,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:30:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:30:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:30:34,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:34,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 1121 transitions, 20277 flow. Second operand has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:34,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:34,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:34,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:38,875 INFO L124 PetriNetUnfolderBase]: 10716/15300 cut-off events. [2024-01-27 15:30:38,875 INFO L125 PetriNetUnfolderBase]: For 383138/383138 co-relation queries the response was YES. [2024-01-27 15:30:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138214 conditions, 15300 events. 10716/15300 cut-off events. For 383138/383138 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 83662 event pairs, 579 based on Foata normal form. 256/15552 useless extension candidates. Maximal degree in co-relation 137520. Up to 5413 conditions per place. [2024-01-27 15:30:39,108 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 972 selfloop transitions, 1309 changer transitions 4/2286 dead transitions. [2024-01-27 15:30:39,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 2286 transitions, 45346 flow [2024-01-27 15:30:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:30:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:30:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 629 transitions. [2024-01-27 15:30:39,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416005291005291 [2024-01-27 15:30:39,111 INFO L175 Difference]: Start difference. First operand has 308 places, 1121 transitions, 20277 flow. Second operand 56 states and 629 transitions. [2024-01-27 15:30:39,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 2286 transitions, 45346 flow [2024-01-27 15:30:43,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 2286 transitions, 43431 flow, removed 331 selfloop flow, removed 14 redundant places. [2024-01-27 15:30:43,419 INFO L231 Difference]: Finished difference. Result has 385 places, 1767 transitions, 36336 flow [2024-01-27 15:30:43,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=19207, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=36336, PETRI_PLACES=385, PETRI_TRANSITIONS=1767} [2024-01-27 15:30:43,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-01-27 15:30:43,421 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1767 transitions, 36336 flow [2024-01-27 15:30:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:43,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:43,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:43,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:30:43,632 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:30:43,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -81578829, now seen corresponding path program 14 times [2024-01-27 15:30:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896292667] [2024-01-27 15:30:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:43,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:43,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896292667] [2024-01-27 15:30:43,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896292667] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547206124] [2024-01-27 15:30:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:30:43,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:43,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:30:43,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:30:43,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:30:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:43,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:30:43,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:30:43,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:30:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547206124] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:43,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-01-27 15:30:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289624998] [2024-01-27 15:30:43,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:30:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:30:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:30:43,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:43,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1767 transitions, 36336 flow. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2024-01-27 15:30:43,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:43,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:43,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:50,993 INFO L124 PetriNetUnfolderBase]: 11773/17003 cut-off events. [2024-01-27 15:30:50,993 INFO L125 PetriNetUnfolderBase]: For 554279/554279 co-relation queries the response was YES. [2024-01-27 15:30:51,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169193 conditions, 17003 events. 11773/17003 cut-off events. For 554279/554279 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 97740 event pairs, 1545 based on Foata normal form. 506/17509 useless extension candidates. Maximal degree in co-relation 168730. Up to 6311 conditions per place. [2024-01-27 15:30:51,995 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1012 selfloop transitions, 941 changer transitions 333/2287 dead transitions. [2024-01-27 15:30:51,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2287 transitions, 50560 flow [2024-01-27 15:30:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:30:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:30:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 397 transitions. [2024-01-27 15:30:51,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324618736383442 [2024-01-27 15:30:51,996 INFO L175 Difference]: Start difference. First operand has 385 places, 1767 transitions, 36336 flow. Second operand 34 states and 397 transitions. [2024-01-27 15:30:51,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2287 transitions, 50560 flow