./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-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-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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:29:20,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:29:20,156 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:29:20,162 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:29:20,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:29:20,196 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:29:20,197 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:29:20,197 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:29:20,198 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:29:20,198 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:29:20,199 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:29:20,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:29:20,200 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:29:20,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:29:20,200 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:29:20,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:29:20,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:29:20,202 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:29:20,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:29:20,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:29:20,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:29:20,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:29:20,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:29:20,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:29:20,204 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:29:20,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:29:20,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:29:20,205 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:29:20,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:29:20,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:29:20,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:29:20,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:29:20,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:20,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:29:20,207 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:29:20,207 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:29:20,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:29:20,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:29:20,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:29:20,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:29:20,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:29:20,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:29:20,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:29:20,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2024-01-27 15:29:20,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:29:20,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:29:20,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:29:20,483 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:29:20,488 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:29:20,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-01-27 15:29:21,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:29:21,886 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:29:21,887 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-01-27 15:29:21,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b4ce0b6/e08adc9b808d477c839e265dc3e212a8/FLAG833f0180f [2024-01-27 15:29:21,907 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b4ce0b6/e08adc9b808d477c839e265dc3e212a8 [2024-01-27 15:29:21,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:29:21,911 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:29:21,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:21,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:29:21,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:29:21,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:21" (1/1) ... [2024-01-27 15:29:21,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a33548c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:21, skipping insertion in model container [2024-01-27 15:29:21,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:21" (1/1) ... [2024-01-27 15:29:21,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:29:22,144 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-dist.wvr.c[2155,2168] [2024-01-27 15:29:22,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:22,156 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:29:22,175 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-dist.wvr.c[2155,2168] [2024-01-27 15:29:22,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:22,193 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:29:22,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22 WrapperNode [2024-01-27 15:29:22,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:22,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:22,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:29:22,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:29:22,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,239 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2024-01-27 15:29:22,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:22,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:29:22,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:29:22,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:29:22,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,267 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 15:29:22,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,287 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:29:22,300 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:29:22,301 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:29:22,301 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:29:22,302 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (1/1) ... [2024-01-27 15:29:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:22,333 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 15:29:22,348 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 15:29:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:29:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:29:22,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:29:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:29:22,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:29:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:29:22,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:29:22,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:29:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:29:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:29:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:29:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:29:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:29:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:29:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:29:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:29:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:29:22,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:29:22,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:29:22,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:29:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:29:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:29:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:29:22,400 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 15:29:22,530 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:29:22,532 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:29:22,717 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:29:22,718 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:29:22,874 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:29:22,875 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:29:22,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:22 BoogieIcfgContainer [2024-01-27 15:29:22,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:29:22,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:29:22,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:29:22,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:29:22,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:29:21" (1/3) ... [2024-01-27 15:29:22,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef9d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:22, skipping insertion in model container [2024-01-27 15:29:22,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:22" (2/3) ... [2024-01-27 15:29:22,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef9d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:22, skipping insertion in model container [2024-01-27 15:29:22,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:22" (3/3) ... [2024-01-27 15:29:22,887 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-01-27 15:29:22,895 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:29:22,906 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:29:22,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:29:22,906 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:29:22,970 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:29:23,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 75 flow [2024-01-27 15:29:23,057 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-27 15:29:23,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:29:23,060 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 15:29:23,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 75 flow [2024-01-27 15:29:23,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2024-01-27 15:29:23,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:29:23,087 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;@731a1f2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:29:23,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:29:23,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:29:23,111 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-01-27 15:29:23,111 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:29:23,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:23,112 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 15:29:23,114 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 15:29:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2051590417, now seen corresponding path program 1 times [2024-01-27 15:29:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592035605] [2024-01-27 15:29:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:23,754 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 15:29:23,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592035605] [2024-01-27 15:29:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592035605] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:23,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:29:23,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507726674] [2024-01-27 15:29:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:29:23,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:29:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:29:23,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:23,829 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 15:29:23,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:23,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:23,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:24,043 INFO L124 PetriNetUnfolderBase]: 428/631 cut-off events. [2024-01-27 15:29:24,044 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-01-27 15:29:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 631 events. 428/631 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1994 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 15:29:24,056 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2024-01-27 15:29:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 199 flow [2024-01-27 15:29:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:29:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:29:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-27 15:29:24,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-27 15:29:24,071 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-27 15:29:24,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 199 flow [2024-01-27 15:29:24,077 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 15:29:24,079 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2024-01-27 15:29:24,081 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 15:29:24,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-01-27 15:29:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2024-01-27 15:29:24,086 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 15:29:24,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:24,087 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 15:29:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:29:24,087 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 15:29:24,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2074147469, now seen corresponding path program 1 times [2024-01-27 15:29:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989385846] [2024-01-27 15:29:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:24,399 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 15:29:24,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989385846] [2024-01-27 15:29:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989385846] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:24,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:29:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270010673] [2024-01-27 15:29:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:24,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:24,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:29:24,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:24,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:24,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:24,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:24,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:24,674 INFO L124 PetriNetUnfolderBase]: 586/837 cut-off events. [2024-01-27 15:29:24,675 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-01-27 15:29:24,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 837 events. 586/837 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 231 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 597. Up to 620 conditions per place. [2024-01-27 15:29:24,680 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 49 selfloop transitions, 18 changer transitions 3/71 dead transitions. [2024-01-27 15:29:24,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 71 transitions, 355 flow [2024-01-27 15:29:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:29:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:29:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-01-27 15:29:24,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-01-27 15:29:24,683 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 89 transitions. [2024-01-27 15:29:24,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 71 transitions, 355 flow [2024-01-27 15:29:24,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:24,689 INFO L231 Difference]: Finished difference. Result has 36 places, 42 transitions, 202 flow [2024-01-27 15:29:24,690 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=36, PETRI_TRANSITIONS=42} [2024-01-27 15:29:24,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-01-27 15:29:24,691 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 42 transitions, 202 flow [2024-01-27 15:29:24,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:24,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:24,694 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 15:29:24,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:29:24,695 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 15:29:24,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:24,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1694506029, now seen corresponding path program 2 times [2024-01-27 15:29:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772670148] [2024-01-27 15:29:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:24,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772670148] [2024-01-27 15:29:24,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772670148] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933602780] [2024-01-27 15:29:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:24,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:24,938 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 15:29:24,961 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 15:29:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:25,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:25,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:25,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:25,937 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 15:29:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933602780] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:25,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-01-27 15:29:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801743455] [2024-01-27 15:29:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:25,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:29:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:29:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:29:25,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:25,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 42 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:25,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:25,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:25,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:26,332 INFO L124 PetriNetUnfolderBase]: 953/1383 cut-off events. [2024-01-27 15:29:26,332 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2024-01-27 15:29:26,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1383 events. 953/1383 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5151 event pairs, 257 based on Foata normal form. 8/1391 useless extension candidates. Maximal degree in co-relation 2476. Up to 504 conditions per place. [2024-01-27 15:29:26,342 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 102 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-01-27 15:29:26,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 124 transitions, 748 flow [2024-01-27 15:29:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:29:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:29:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-01-27 15:29:26,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:29:26,345 INFO L175 Difference]: Start difference. First operand has 36 places, 42 transitions, 202 flow. Second operand 8 states and 135 transitions. [2024-01-27 15:29:26,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 124 transitions, 748 flow [2024-01-27 15:29:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 124 transitions, 726 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:26,352 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 335 flow [2024-01-27 15:29:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2024-01-27 15:29:26,353 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-01-27 15:29:26,353 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 335 flow [2024-01-27 15:29:26,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:26,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:26,354 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 15:29:26,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:29:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:26,576 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 15:29:26,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2068378681, now seen corresponding path program 3 times [2024-01-27 15:29:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387900269] [2024-01-27 15:29:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:26,818 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 15:29:26,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387900269] [2024-01-27 15:29:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387900269] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:29:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268339465] [2024-01-27 15:29:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:29:26,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:27,126 INFO L124 PetriNetUnfolderBase]: 1156/1652 cut-off events. [2024-01-27 15:29:27,127 INFO L125 PetriNetUnfolderBase]: For 4334/4334 co-relation queries the response was YES. [2024-01-27 15:29:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 1652 events. 1156/1652 cut-off events. For 4334/4334 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6202 event pairs, 423 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 4247. Up to 1230 conditions per place. [2024-01-27 15:29:27,141 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 70 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2024-01-27 15:29:27,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 102 transitions, 790 flow [2024-01-27 15:29:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:29:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:29:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-01-27 15:29:27,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-01-27 15:29:27,143 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 335 flow. Second operand 7 states and 89 transitions. [2024-01-27 15:29:27,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 102 transitions, 790 flow [2024-01-27 15:29:27,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 102 transitions, 770 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:27,162 INFO L231 Difference]: Finished difference. Result has 56 places, 72 transitions, 533 flow [2024-01-27 15:29:27,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=56, PETRI_TRANSITIONS=72} [2024-01-27 15:29:27,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-01-27 15:29:27,164 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 72 transitions, 533 flow [2024-01-27 15:29:27,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:27,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:27,164 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 15:29:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:29:27,165 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 15:29:27,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1310370119, now seen corresponding path program 4 times [2024-01-27 15:29:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277860106] [2024-01-27 15:29:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:27,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277860106] [2024-01-27 15:29:27,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277860106] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:27,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924654083] [2024-01-27 15:29:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:27,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:27,373 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 15:29:27,399 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 15:29:27,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:27,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:29:27,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:27,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:28,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924654083] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:28,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:28,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-27 15:29:28,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676981889] [2024-01-27 15:29:28,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:28,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:29:28,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:29:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:29:28,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:28,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 72 transitions, 533 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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 15:29:28,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:28,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:29,311 INFO L124 PetriNetUnfolderBase]: 1849/2801 cut-off events. [2024-01-27 15:29:29,311 INFO L125 PetriNetUnfolderBase]: For 9661/9661 co-relation queries the response was YES. [2024-01-27 15:29:29,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12262 conditions, 2801 events. 1849/2801 cut-off events. For 9661/9661 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13105 event pairs, 234 based on Foata normal form. 26/2827 useless extension candidates. Maximal degree in co-relation 7742. Up to 927 conditions per place. [2024-01-27 15:29:29,335 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 219 selfloop transitions, 78 changer transitions 0/298 dead transitions. [2024-01-27 15:29:29,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 298 transitions, 2311 flow [2024-01-27 15:29:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:29:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:29:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 313 transitions. [2024-01-27 15:29:29,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269360269360269 [2024-01-27 15:29:29,339 INFO L175 Difference]: Start difference. First operand has 56 places, 72 transitions, 533 flow. Second operand 22 states and 313 transitions. [2024-01-27 15:29:29,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 298 transitions, 2311 flow [2024-01-27 15:29:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 298 transitions, 2225 flow, removed 43 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:29,386 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1243 flow [2024-01-27 15:29:29,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1243, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-01-27 15:29:29,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-01-27 15:29:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1243 flow [2024-01-27 15:29:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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 15:29:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:29,389 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 15:29:29,407 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 15:29:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:29,608 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 15:29:29,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1018319988, now seen corresponding path program 1 times [2024-01-27 15:29:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:29,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591876237] [2024-01-27 15:29:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:29,806 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 15:29:29,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591876237] [2024-01-27 15:29:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591876237] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:29,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:29,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:29:29,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020334144] [2024-01-27 15:29:29,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:29,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:29:29,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:29,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:29,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:29,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:29,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:30,402 INFO L124 PetriNetUnfolderBase]: 1950/2981 cut-off events. [2024-01-27 15:29:30,402 INFO L125 PetriNetUnfolderBase]: For 26533/26533 co-relation queries the response was YES. [2024-01-27 15:29:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16818 conditions, 2981 events. 1950/2981 cut-off events. For 26533/26533 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14359 event pairs, 631 based on Foata normal form. 16/2997 useless extension candidates. Maximal degree in co-relation 13577. Up to 1777 conditions per place. [2024-01-27 15:29:30,429 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 165 selfloop transitions, 41 changer transitions 6/213 dead transitions. [2024-01-27 15:29:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 213 transitions, 2347 flow [2024-01-27 15:29:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:29:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:29:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-01-27 15:29:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:29:30,431 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1243 flow. Second operand 7 states and 105 transitions. [2024-01-27 15:29:30,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 213 transitions, 2347 flow [2024-01-27 15:29:30,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 213 transitions, 2235 flow, removed 56 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:30,499 INFO L231 Difference]: Finished difference. Result has 103 places, 135 transitions, 1389 flow [2024-01-27 15:29:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=103, PETRI_TRANSITIONS=135} [2024-01-27 15:29:30,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-01-27 15:29:30,500 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 135 transitions, 1389 flow [2024-01-27 15:29:30,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:30,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:30,501 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 15:29:30,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:29:30,501 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 15:29:30,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1721431790, now seen corresponding path program 2 times [2024-01-27 15:29:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:30,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333530221] [2024-01-27 15:29:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:30,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333530221] [2024-01-27 15:29:30,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333530221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113059475] [2024-01-27 15:29:30,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:30,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:30,698 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 15:29:30,717 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 15:29:30,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:30,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:30,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:30,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:31,034 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 15:29:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113059475] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:31,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 17 [2024-01-27 15:29:31,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40162588] [2024-01-27 15:29:31,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:31,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:31,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:31,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:31,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:29:31,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:31,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:31,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:31,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:31,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:32,171 INFO L124 PetriNetUnfolderBase]: 2981/4550 cut-off events. [2024-01-27 15:29:32,172 INFO L125 PetriNetUnfolderBase]: For 48405/48405 co-relation queries the response was YES. [2024-01-27 15:29:32,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 4550 events. 2981/4550 cut-off events. For 48405/48405 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23523 event pairs, 481 based on Foata normal form. 4/4554 useless extension candidates. Maximal degree in co-relation 25620. Up to 1517 conditions per place. [2024-01-27 15:29:32,223 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 210 selfloop transitions, 82 changer transitions 1/294 dead transitions. [2024-01-27 15:29:32,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 294 transitions, 3349 flow [2024-01-27 15:29:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:29:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:29:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-01-27 15:29:32,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589225589225589 [2024-01-27 15:29:32,226 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 1389 flow. Second operand 11 states and 166 transitions. [2024-01-27 15:29:32,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 294 transitions, 3349 flow [2024-01-27 15:29:32,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 294 transitions, 3166 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-01-27 15:29:32,403 INFO L231 Difference]: Finished difference. Result has 118 places, 191 transitions, 2314 flow [2024-01-27 15:29:32,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2314, PETRI_PLACES=118, PETRI_TRANSITIONS=191} [2024-01-27 15:29:32,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-01-27 15:29:32,404 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 191 transitions, 2314 flow [2024-01-27 15:29:32,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:32,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:32,404 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 15:29:32,416 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 15:29:32,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:32,607 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 15:29:32,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1936107039, now seen corresponding path program 5 times [2024-01-27 15:29:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:32,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500700317] [2024-01-27 15:29:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:32,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500700317] [2024-01-27 15:29:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500700317] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875324959] [2024-01-27 15:29:32,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:32,832 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 15:29:32,844 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 15:29:32,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:32,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:32,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:33,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875324959] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:33,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-01-27 15:29:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617532874] [2024-01-27 15:29:33,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:33,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:29:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:29:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:29:33,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:33,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 191 transitions, 2314 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 15:29:33,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:33,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:33,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:34,942 INFO L124 PetriNetUnfolderBase]: 4137/6326 cut-off events. [2024-01-27 15:29:34,942 INFO L125 PetriNetUnfolderBase]: For 93601/93601 co-relation queries the response was YES. [2024-01-27 15:29:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42353 conditions, 6326 events. 4137/6326 cut-off events. For 93601/93601 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34968 event pairs, 498 based on Foata normal form. 42/6368 useless extension candidates. Maximal degree in co-relation 39697. Up to 2749 conditions per place. [2024-01-27 15:29:35,033 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 281 selfloop transitions, 248 changer transitions 4/534 dead transitions. [2024-01-27 15:29:35,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 534 transitions, 7279 flow [2024-01-27 15:29:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:29:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:29:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 282 transitions. [2024-01-27 15:29:35,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-01-27 15:29:35,035 INFO L175 Difference]: Start difference. First operand has 118 places, 191 transitions, 2314 flow. Second operand 21 states and 282 transitions. [2024-01-27 15:29:35,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 534 transitions, 7279 flow [2024-01-27 15:29:35,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 534 transitions, 6987 flow, removed 146 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:35,428 INFO L231 Difference]: Finished difference. Result has 153 places, 359 transitions, 5417 flow [2024-01-27 15:29:35,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5417, PETRI_PLACES=153, PETRI_TRANSITIONS=359} [2024-01-27 15:29:35,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-01-27 15:29:35,429 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 359 transitions, 5417 flow [2024-01-27 15:29:35,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 15:29:35,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:35,430 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 15:29:35,448 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 15:29:35,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:35,645 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 15:29:35,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash -48422860, now seen corresponding path program 3 times [2024-01-27 15:29:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:35,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133091972] [2024-01-27 15:29:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133091972] [2024-01-27 15:29:35,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133091972] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875026918] [2024-01-27 15:29:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:35,881 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 15:29:35,884 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 15:29:35,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:29:35,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:35,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:35,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:36,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875026918] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:36,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:36,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:29:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582985441] [2024-01-27 15:29:36,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:29:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:29:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:29:36,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:36,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 359 transitions, 5417 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:36,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:36,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:36,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:37,835 INFO L124 PetriNetUnfolderBase]: 4417/6764 cut-off events. [2024-01-27 15:29:37,836 INFO L125 PetriNetUnfolderBase]: For 145095/145095 co-relation queries the response was YES. [2024-01-27 15:29:37,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51700 conditions, 6764 events. 4417/6764 cut-off events. For 145095/145095 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 37894 event pairs, 886 based on Foata normal form. 38/6802 useless extension candidates. Maximal degree in co-relation 49356. Up to 2925 conditions per place. [2024-01-27 15:29:37,910 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 268 selfloop transitions, 249 changer transitions 0/518 dead transitions. [2024-01-27 15:29:37,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 518 transitions, 8309 flow [2024-01-27 15:29:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:29:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:29:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2024-01-27 15:29:37,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401234567901234 [2024-01-27 15:29:37,912 INFO L175 Difference]: Start difference. First operand has 153 places, 359 transitions, 5417 flow. Second operand 12 states and 175 transitions. [2024-01-27 15:29:37,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 518 transitions, 8309 flow [2024-01-27 15:29:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 518 transitions, 7761 flow, removed 274 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:38,522 INFO L231 Difference]: Finished difference. Result has 171 places, 408 transitions, 6518 flow [2024-01-27 15:29:38,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6518, PETRI_PLACES=171, PETRI_TRANSITIONS=408} [2024-01-27 15:29:38,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-01-27 15:29:38,523 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 408 transitions, 6518 flow [2024-01-27 15:29:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:38,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:38,524 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] [2024-01-27 15:29:38,536 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 15:29:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:38,728 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 15:29:38,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1224285637, now seen corresponding path program 6 times [2024-01-27 15:29:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909531952] [2024-01-27 15:29:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:38,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909531952] [2024-01-27 15:29:38,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909531952] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202767439] [2024-01-27 15:29:38,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:29:38,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:38,927 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 15:29:38,946 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 15:29:39,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:29:39,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:39,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:29:39,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:39,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:39,264 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 15:29:39,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202767439] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:39,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:39,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2024-01-27 15:29:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902265572] [2024-01-27 15:29:39,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:29:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:29:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:29:39,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:39,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 408 transitions, 6518 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:39,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:39,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:39,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:40,541 INFO L124 PetriNetUnfolderBase]: 4539/6942 cut-off events. [2024-01-27 15:29:40,541 INFO L125 PetriNetUnfolderBase]: For 140106/140106 co-relation queries the response was YES. [2024-01-27 15:29:40,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53067 conditions, 6942 events. 4539/6942 cut-off events. For 140106/140106 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38965 event pairs, 1150 based on Foata normal form. 36/6978 useless extension candidates. Maximal degree in co-relation 52337. Up to 3710 conditions per place. [2024-01-27 15:29:40,620 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 398 selfloop transitions, 83 changer transitions 0/482 dead transitions. [2024-01-27 15:29:40,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 482 transitions, 8373 flow [2024-01-27 15:29:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:29:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:29:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-01-27 15:29:40,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-01-27 15:29:40,622 INFO L175 Difference]: Start difference. First operand has 171 places, 408 transitions, 6518 flow. Second operand 6 states and 95 transitions. [2024-01-27 15:29:40,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 482 transitions, 8373 flow [2024-01-27 15:29:41,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 482 transitions, 8330 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:41,255 INFO L231 Difference]: Finished difference. Result has 178 places, 422 transitions, 6943 flow [2024-01-27 15:29:41,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6943, PETRI_PLACES=178, PETRI_TRANSITIONS=422} [2024-01-27 15:29:41,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-01-27 15:29:41,256 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 422 transitions, 6943 flow [2024-01-27 15:29:41,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:41,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:41,257 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 15:29:41,267 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 15:29:41,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:41,458 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 15:29:41,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:41,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1016901794, now seen corresponding path program 4 times [2024-01-27 15:29:41,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:41,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140597643] [2024-01-27 15:29:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:41,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:41,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:41,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140597643] [2024-01-27 15:29:41,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140597643] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:41,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545783077] [2024-01-27 15:29:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:41,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:41,597 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 15:29:41,612 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 15:29:41,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:41,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:41,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:29:41,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:41,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545783077] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:41,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:41,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-27 15:29:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468523862] [2024-01-27 15:29:41,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:41,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:29:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:29:41,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:29:41,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:41,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 422 transitions, 6943 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 15:29:41,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:41,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:44,522 INFO L124 PetriNetUnfolderBase]: 7038/10643 cut-off events. [2024-01-27 15:29:44,523 INFO L125 PetriNetUnfolderBase]: For 251367/251367 co-relation queries the response was YES. [2024-01-27 15:29:44,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85532 conditions, 10643 events. 7038/10643 cut-off events. For 251367/251367 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 63067 event pairs, 1311 based on Foata normal form. 56/10699 useless extension candidates. Maximal degree in co-relation 84891. Up to 4000 conditions per place. [2024-01-27 15:29:44,647 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 567 selfloop transitions, 222 changer transitions 0/790 dead transitions. [2024-01-27 15:29:44,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 790 transitions, 13580 flow [2024-01-27 15:29:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:29:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:29:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 260 transitions. [2024-01-27 15:29:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50682261208577 [2024-01-27 15:29:44,651 INFO L175 Difference]: Start difference. First operand has 178 places, 422 transitions, 6943 flow. Second operand 19 states and 260 transitions. [2024-01-27 15:29:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 790 transitions, 13580 flow [2024-01-27 15:29:45,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 790 transitions, 13399 flow, removed 66 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:45,678 INFO L231 Difference]: Finished difference. Result has 208 places, 500 transitions, 9003 flow [2024-01-27 15:29:45,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9003, PETRI_PLACES=208, PETRI_TRANSITIONS=500} [2024-01-27 15:29:45,679 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-01-27 15:29:45,679 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 500 transitions, 9003 flow [2024-01-27 15:29:45,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 15:29:45,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:45,680 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 15:29:45,691 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 15:29:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:45,880 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 15:29:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1146780199, now seen corresponding path program 1 times [2024-01-27 15:29:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942706685] [2024-01-27 15:29:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:46,036 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 15:29:46,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942706685] [2024-01-27 15:29:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942706685] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:46,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:46,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:29:46,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265234258] [2024-01-27 15:29:46,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:46,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:46,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:29:46,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:46,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 500 transitions, 9003 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:46,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:46,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:46,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:48,315 INFO L124 PetriNetUnfolderBase]: 7049/10699 cut-off events. [2024-01-27 15:29:48,315 INFO L125 PetriNetUnfolderBase]: For 320746/320746 co-relation queries the response was YES. [2024-01-27 15:29:48,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94452 conditions, 10699 events. 7049/10699 cut-off events. For 320746/320746 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 63741 event pairs, 2132 based on Foata normal form. 30/10729 useless extension candidates. Maximal degree in co-relation 93842. Up to 7812 conditions per place. [2024-01-27 15:29:48,461 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 432 selfloop transitions, 115 changer transitions 18/566 dead transitions. [2024-01-27 15:29:48,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 566 transitions, 10803 flow [2024-01-27 15:29:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:29:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:29:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-01-27 15:29:48,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-01-27 15:29:48,463 INFO L175 Difference]: Start difference. First operand has 208 places, 500 transitions, 9003 flow. Second operand 7 states and 107 transitions. [2024-01-27 15:29:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 566 transitions, 10803 flow [2024-01-27 15:29:49,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 566 transitions, 10435 flow, removed 112 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:49,878 INFO L231 Difference]: Finished difference. Result has 214 places, 498 transitions, 8849 flow [2024-01-27 15:29:49,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8637, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8849, PETRI_PLACES=214, PETRI_TRANSITIONS=498} [2024-01-27 15:29:49,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-01-27 15:29:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 498 transitions, 8849 flow [2024-01-27 15:29:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:49,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:49,879 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 15:29:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:29:49,880 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 15:29:49,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1193545713, now seen corresponding path program 7 times [2024-01-27 15:29:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428746547] [2024-01-27 15:29:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428746547] [2024-01-27 15:29:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428746547] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424405294] [2024-01-27 15:29:50,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:29:50,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:50,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:50,021 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 15:29:50,023 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 15:29:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:50,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:50,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:50,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:50,457 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 15:29:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424405294] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:50,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:50,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2024-01-27 15:29:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578937473] [2024-01-27 15:29:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:29:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:29:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:29:50,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:50,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 498 transitions, 8849 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:50,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:50,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:50,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:52,709 INFO L124 PetriNetUnfolderBase]: 7061/10714 cut-off events. [2024-01-27 15:29:52,709 INFO L125 PetriNetUnfolderBase]: For 303609/303609 co-relation queries the response was YES. [2024-01-27 15:29:52,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93349 conditions, 10714 events. 7061/10714 cut-off events. For 303609/303609 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 63883 event pairs, 1628 based on Foata normal form. 56/10770 useless extension candidates. Maximal degree in co-relation 92963. Up to 6765 conditions per place. [2024-01-27 15:29:52,834 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 473 selfloop transitions, 106 changer transitions 0/580 dead transitions. [2024-01-27 15:29:52,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 580 transitions, 11184 flow [2024-01-27 15:29:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:29:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:29:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-01-27 15:29:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-27 15:29:52,835 INFO L175 Difference]: Start difference. First operand has 214 places, 498 transitions, 8849 flow. Second operand 6 states and 93 transitions. [2024-01-27 15:29:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 580 transitions, 11184 flow [2024-01-27 15:29:54,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 580 transitions, 10942 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-27 15:29:54,105 INFO L231 Difference]: Finished difference. Result has 211 places, 506 transitions, 9013 flow [2024-01-27 15:29:54,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8607, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9013, PETRI_PLACES=211, PETRI_TRANSITIONS=506} [2024-01-27 15:29:54,106 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-01-27 15:29:54,106 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 506 transitions, 9013 flow [2024-01-27 15:29:54,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:54,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:54,107 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 15:29:54,118 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 15:29:54,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:29:54,307 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 15:29:54,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash -221401947, now seen corresponding path program 8 times [2024-01-27 15:29:54,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:54,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413977241] [2024-01-27 15:29:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:54,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413977241] [2024-01-27 15:29:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413977241] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413666070] [2024-01-27 15:29:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:54,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:54,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:54,442 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 15:29:54,461 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 15:29:54,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:54,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:54,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:54,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:54,728 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 15:29:54,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413666070] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:54,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:29:54,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2024-01-27 15:29:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982572294] [2024-01-27 15:29:54,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:54,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:29:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:29:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:29:54,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:54,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 506 transitions, 9013 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:54,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:54,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:54,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:57,149 INFO L124 PetriNetUnfolderBase]: 7722/11611 cut-off events. [2024-01-27 15:29:57,149 INFO L125 PetriNetUnfolderBase]: For 343196/343196 co-relation queries the response was YES. [2024-01-27 15:29:57,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102655 conditions, 11611 events. 7722/11611 cut-off events. For 343196/343196 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 69109 event pairs, 1567 based on Foata normal form. 64/11675 useless extension candidates. Maximal degree in co-relation 102073. Up to 6899 conditions per place. [2024-01-27 15:29:57,275 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 494 selfloop transitions, 138 changer transitions 0/633 dead transitions. [2024-01-27 15:29:57,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 633 transitions, 12269 flow [2024-01-27 15:29:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:29:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:29:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-01-27 15:29:57,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-01-27 15:29:57,276 INFO L175 Difference]: Start difference. First operand has 211 places, 506 transitions, 9013 flow. Second operand 6 states and 95 transitions. [2024-01-27 15:29:57,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 633 transitions, 12269 flow [2024-01-27 15:29:58,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 633 transitions, 12039 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:29:58,669 INFO L231 Difference]: Finished difference. Result has 216 places, 553 transitions, 10318 flow [2024-01-27 15:29:58,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10318, PETRI_PLACES=216, PETRI_TRANSITIONS=553} [2024-01-27 15:29:58,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-01-27 15:29:58,670 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 553 transitions, 10318 flow [2024-01-27 15:29:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:29:58,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:58,671 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 15:29:58,681 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 15:29:58,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:29:58,871 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 15:29:58,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 67318620, now seen corresponding path program 5 times [2024-01-27 15:29:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852379552] [2024-01-27 15:29:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:59,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852379552] [2024-01-27 15:29:59,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852379552] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:59,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685347263] [2024-01-27 15:29:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:59,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:59,138 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 15:29:59,143 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 15:29:59,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:59,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:59,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:29:59,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:59,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685347263] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:59,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:59,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-27 15:29:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47742657] [2024-01-27 15:29:59,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:59,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:29:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:29:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:29:59,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:29:59,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 553 transitions, 10318 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 15:29:59,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:59,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:29:59,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:02,335 INFO L124 PetriNetUnfolderBase]: 7769/11677 cut-off events. [2024-01-27 15:30:02,335 INFO L125 PetriNetUnfolderBase]: For 414928/414928 co-relation queries the response was YES. [2024-01-27 15:30:02,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108643 conditions, 11677 events. 7769/11677 cut-off events. For 414928/414928 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 69731 event pairs, 1293 based on Foata normal form. 36/11713 useless extension candidates. Maximal degree in co-relation 108445. Up to 4601 conditions per place. [2024-01-27 15:30:02,453 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 669 selfloop transitions, 242 changer transitions 0/912 dead transitions. [2024-01-27 15:30:02,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 912 transitions, 17755 flow [2024-01-27 15:30:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:30:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:30:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 274 transitions. [2024-01-27 15:30:02,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48324514991181655 [2024-01-27 15:30:02,455 INFO L175 Difference]: Start difference. First operand has 216 places, 553 transitions, 10318 flow. Second operand 21 states and 274 transitions. [2024-01-27 15:30:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 912 transitions, 17755 flow [2024-01-27 15:30:04,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 912 transitions, 17394 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-01-27 15:30:04,690 INFO L231 Difference]: Finished difference. Result has 245 places, 605 transitions, 11909 flow [2024-01-27 15:30:04,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10111, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11909, PETRI_PLACES=245, PETRI_TRANSITIONS=605} [2024-01-27 15:30:04,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-01-27 15:30:04,691 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 605 transitions, 11909 flow [2024-01-27 15:30:04,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 15:30:04,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:04,691 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 15:30:04,704 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 15:30:04,898 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,SelfDestructingSolverStorable14 [2024-01-27 15:30:04,899 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 15:30:04,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -569670317, now seen corresponding path program 9 times [2024-01-27 15:30:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582992412] [2024-01-27 15:30:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:05,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:05,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582992412] [2024-01-27 15:30:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582992412] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341565069] [2024-01-27 15:30:05,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:30:05,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:05,055 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 15:30:05,075 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 15:30:05,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:30:05,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:05,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:30:05,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:05,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:05,303 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 15:30:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341565069] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:05,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:30:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-01-27 15:30:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570290468] [2024-01-27 15:30:05,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:30:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:30:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:30:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:30:05,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:05,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 605 transitions, 11909 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:30:05,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:05,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:05,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:08,317 INFO L124 PetriNetUnfolderBase]: 7998/12146 cut-off events. [2024-01-27 15:30:08,318 INFO L125 PetriNetUnfolderBase]: For 460060/460060 co-relation queries the response was YES. [2024-01-27 15:30:08,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116579 conditions, 12146 events. 7998/12146 cut-off events. For 460060/460060 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 74294 event pairs, 1043 based on Foata normal form. 56/12202 useless extension candidates. Maximal degree in co-relation 116041. Up to 4615 conditions per place. [2024-01-27 15:30:08,449 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 511 selfloop transitions, 243 changer transitions 0/755 dead transitions. [2024-01-27 15:30:08,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 755 transitions, 15705 flow [2024-01-27 15:30:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:30:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:30:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-01-27 15:30:08,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-01-27 15:30:08,451 INFO L175 Difference]: Start difference. First operand has 245 places, 605 transitions, 11909 flow. Second operand 8 states and 137 transitions. [2024-01-27 15:30:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 755 transitions, 15705 flow [2024-01-27 15:30:10,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 755 transitions, 15234 flow, removed 167 selfloop flow, removed 2 redundant places. [2024-01-27 15:30:10,765 INFO L231 Difference]: Finished difference. Result has 253 places, 634 transitions, 12933 flow [2024-01-27 15:30:10,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11489, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12933, PETRI_PLACES=253, PETRI_TRANSITIONS=634} [2024-01-27 15:30:10,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-01-27 15:30:10,766 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 634 transitions, 12933 flow [2024-01-27 15:30:10,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:30:10,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:10,767 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 15:30:10,778 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 15:30:10,970 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,SelfDestructingSolverStorable15 [2024-01-27 15:30:10,971 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 15:30:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -21602275, now seen corresponding path program 10 times [2024-01-27 15:30:10,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:10,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043946625] [2024-01-27 15:30:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043946625] [2024-01-27 15:30:11,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043946625] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185506216] [2024-01-27 15:30:11,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:30:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:11,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:11,114 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 15:30:11,132 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 15:30:11,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:30:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:11,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:30:11,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:11,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:11,453 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 15:30:11,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185506216] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:11,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:30:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2024-01-27 15:30:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918487339] [2024-01-27 15:30:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:30:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:30:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:30:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:30:11,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:11,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 634 transitions, 12933 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:30:11,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:11,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:11,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:14,385 INFO L124 PetriNetUnfolderBase]: 7929/11962 cut-off events. [2024-01-27 15:30:14,385 INFO L125 PetriNetUnfolderBase]: For 441914/441914 co-relation queries the response was YES. [2024-01-27 15:30:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115509 conditions, 11962 events. 7929/11962 cut-off events. For 441914/441914 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 72132 event pairs, 1550 based on Foata normal form. 56/12018 useless extension candidates. Maximal degree in co-relation 114987. Up to 7106 conditions per place. [2024-01-27 15:30:14,528 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 525 selfloop transitions, 185 changer transitions 0/711 dead transitions. [2024-01-27 15:30:14,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 711 transitions, 15405 flow [2024-01-27 15:30:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:30:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:30:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-01-27 15:30:14,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-27 15:30:14,529 INFO L175 Difference]: Start difference. First operand has 253 places, 634 transitions, 12933 flow. Second operand 6 states and 93 transitions. [2024-01-27 15:30:14,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 711 transitions, 15405 flow [2024-01-27 15:30:17,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 711 transitions, 15167 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-01-27 15:30:17,116 INFO L231 Difference]: Finished difference. Result has 257 places, 632 transitions, 13047 flow [2024-01-27 15:30:17,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12660, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13047, PETRI_PLACES=257, PETRI_TRANSITIONS=632} [2024-01-27 15:30:17,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-01-27 15:30:17,117 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 632 transitions, 13047 flow [2024-01-27 15:30:17,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 15:30:17,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:17,117 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 15:30:17,128 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 15:30:17,317 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,SelfDestructingSolverStorable16 [2024-01-27 15:30:17,318 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 15:30:17,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 610470797, now seen corresponding path program 11 times [2024-01-27 15:30:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:17,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589476842] [2024-01-27 15:30:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:17,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:17,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589476842] [2024-01-27 15:30:17,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589476842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:17,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714941377] [2024-01-27 15:30:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:30:17,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:17,448 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 15:30:17,470 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 15:30:17,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:30:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:17,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:30:17,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:17,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714941377] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:18,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-01-27 15:30:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614764535] [2024-01-27 15:30:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:30:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:30:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:30:18,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:18,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 632 transitions, 13047 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 15:30:18,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:18,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:18,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:22,893 INFO L124 PetriNetUnfolderBase]: 10280/15497 cut-off events. [2024-01-27 15:30:22,893 INFO L125 PetriNetUnfolderBase]: For 591042/591042 co-relation queries the response was YES. [2024-01-27 15:30:22,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150435 conditions, 15497 events. 10280/15497 cut-off events. For 591042/591042 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 98029 event pairs, 1714 based on Foata normal form. 68/15565 useless extension candidates. Maximal degree in co-relation 149927. Up to 7775 conditions per place. [2024-01-27 15:30:23,071 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 528 selfloop transitions, 640 changer transitions 0/1169 dead transitions. [2024-01-27 15:30:23,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1169 transitions, 25580 flow [2024-01-27 15:30:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:30:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:30:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 365 transitions. [2024-01-27 15:30:23,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006858710562414 [2024-01-27 15:30:23,074 INFO L175 Difference]: Start difference. First operand has 257 places, 632 transitions, 13047 flow. Second operand 27 states and 365 transitions. [2024-01-27 15:30:23,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1169 transitions, 25580 flow [2024-01-27 15:30:26,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1169 transitions, 25214 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-01-27 15:30:26,123 INFO L231 Difference]: Finished difference. Result has 295 places, 928 transitions, 21879 flow [2024-01-27 15:30:26,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12813, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21879, PETRI_PLACES=295, PETRI_TRANSITIONS=928} [2024-01-27 15:30:26,125 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-01-27 15:30:26,125 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 928 transitions, 21879 flow [2024-01-27 15:30:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 15:30:26,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:26,126 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 15:30:26,144 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 15:30:26,340 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,SelfDestructingSolverStorable17 [2024-01-27 15:30:26,341 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 15:30:26,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1429054699, now seen corresponding path program 2 times [2024-01-27 15:30:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:26,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964881199] [2024-01-27 15:30:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:26,509 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 15:30:26,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:26,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964881199] [2024-01-27 15:30:26,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964881199] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:30:26,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:30:26,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:30:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284455536] [2024-01-27 15:30:26,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:30:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:30:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:30:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:30:26,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 928 transitions, 21879 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:26,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:26,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:26,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:31,025 INFO L124 PetriNetUnfolderBase]: 10300/15586 cut-off events. [2024-01-27 15:30:31,026 INFO L125 PetriNetUnfolderBase]: For 687957/687957 co-relation queries the response was YES. [2024-01-27 15:30:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164118 conditions, 15586 events. 10300/15586 cut-off events. For 687957/687957 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 98729 event pairs, 2949 based on Foata normal form. 36/15622 useless extension candidates. Maximal degree in co-relation 163556. Up to 14542 conditions per place. [2024-01-27 15:30:31,242 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 835 selfloop transitions, 128 changer transitions 11/975 dead transitions. [2024-01-27 15:30:31,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 975 transitions, 24310 flow [2024-01-27 15:30:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:30:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:30:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-01-27 15:30:31,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-01-27 15:30:31,243 INFO L175 Difference]: Start difference. First operand has 295 places, 928 transitions, 21879 flow. Second operand 7 states and 101 transitions. [2024-01-27 15:30:31,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 975 transitions, 24310 flow [2024-01-27 15:30:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 975 transitions, 23129 flow, removed 445 selfloop flow, removed 4 redundant places. [2024-01-27 15:30:36,129 INFO L231 Difference]: Finished difference. Result has 300 places, 928 transitions, 20989 flow [2024-01-27 15:30:36,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20702, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20989, PETRI_PLACES=300, PETRI_TRANSITIONS=928} [2024-01-27 15:30:36,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-01-27 15:30:36,130 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 928 transitions, 20989 flow [2024-01-27 15:30:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:36,131 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 15:30:36,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-27 15:30:36,131 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 15:30:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2071778992, now seen corresponding path program 6 times [2024-01-27 15:30:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799813674] [2024-01-27 15:30:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799813674] [2024-01-27 15:30:36,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799813674] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026129768] [2024-01-27 15:30:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:30:36,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:36,248 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 15:30:36,256 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 15:30:36,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:30:36,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:36,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:30:36,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:36,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026129768] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:36,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:36,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:30:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885766972] [2024-01-27 15:30:36,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:36,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:30:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:30:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:30:36,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:36,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 928 transitions, 20989 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:36,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:36,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:36,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:42,084 INFO L124 PetriNetUnfolderBase]: 10983/16645 cut-off events. [2024-01-27 15:30:42,084 INFO L125 PetriNetUnfolderBase]: For 698472/698472 co-relation queries the response was YES. [2024-01-27 15:30:42,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170368 conditions, 16645 events. 10983/16645 cut-off events. For 698472/698472 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 106957 event pairs, 2440 based on Foata normal form. 32/16677 useless extension candidates. Maximal degree in co-relation 170141. Up to 10105 conditions per place. [2024-01-27 15:30:42,329 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 634 selfloop transitions, 439 changer transitions 0/1074 dead transitions. [2024-01-27 15:30:42,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1074 transitions, 25615 flow [2024-01-27 15:30:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:30:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:30:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-01-27 15:30:42,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387205387205387 [2024-01-27 15:30:42,330 INFO L175 Difference]: Start difference. First operand has 300 places, 928 transitions, 20989 flow. Second operand 11 states and 160 transitions. [2024-01-27 15:30:42,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1074 transitions, 25615 flow [2024-01-27 15:30:47,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1074 transitions, 25326 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-01-27 15:30:47,831 INFO L231 Difference]: Finished difference. Result has 310 places, 970 transitions, 23108 flow [2024-01-27 15:30:47,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20725, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23108, PETRI_PLACES=310, PETRI_TRANSITIONS=970} [2024-01-27 15:30:47,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-01-27 15:30:47,833 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 970 transitions, 23108 flow [2024-01-27 15:30:47,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:47,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:47,833 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 15:30:47,850 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 15:30:48,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:48,051 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 15:30:48,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:48,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1429797634, now seen corresponding path program 7 times [2024-01-27 15:30:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:48,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563236716] [2024-01-27 15:30:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:48,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:48,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:48,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563236716] [2024-01-27 15:30:48,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563236716] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:48,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782330060] [2024-01-27 15:30:48,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:30:48,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:48,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:48,192 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 15:30:48,221 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 15:30:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:48,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:30:48,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:48,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:48,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782330060] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:48,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:48,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-01-27 15:30:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116098827] [2024-01-27 15:30:48,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:48,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:30:48,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:30:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:30:48,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:30:48,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 970 transitions, 23108 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 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 15:30:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:48,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:30:48,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:53,956 INFO L124 PetriNetUnfolderBase]: 11461/17285 cut-off events. [2024-01-27 15:30:53,956 INFO L125 PetriNetUnfolderBase]: For 760421/760421 co-relation queries the response was YES. [2024-01-27 15:30:54,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183039 conditions, 17285 events. 11461/17285 cut-off events. For 760421/760421 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 111045 event pairs, 2841 based on Foata normal form. 70/17355 useless extension candidates. Maximal degree in co-relation 182343. Up to 14343 conditions per place. [2024-01-27 15:30:54,460 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 939 selfloop transitions, 346 changer transitions 0/1286 dead transitions. [2024-01-27 15:30:54,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1286 transitions, 32325 flow [2024-01-27 15:30:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:30:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:30:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 247 transitions. [2024-01-27 15:30:54,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-01-27 15:30:54,462 INFO L175 Difference]: Start difference. First operand has 310 places, 970 transitions, 23108 flow. Second operand 19 states and 247 transitions. [2024-01-27 15:30:54,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1286 transitions, 32325 flow