./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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/chl-name-comparator-trans.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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:23:33,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:23:33,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:23:33,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:23:33,308 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:23:33,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:23:33,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:23:33,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:23:33,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:23:33,331 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:23:33,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:23:33,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:23:33,332 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:23:33,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:23:33,335 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:23:33,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:23:33,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:23:33,336 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:23:33,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:23:33,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:23:33,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:23:33,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:23:33,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:23:33,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:23:33,338 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:23:33,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:23:33,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:23:33,339 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:23:33,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:23:33,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:23:33,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:23:33,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:23:33,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:23:33,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:23:33,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:23:33,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:23:33,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:23:33,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:23:33,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:23:33,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:23:33,342 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:23:33,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:23:33,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:23:33,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-01-27 15:23:33,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:23:33,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:23:33,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:23:33,578 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:23:33,578 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:23:33,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-01-27 15:23:34,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:23:34,873 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:23:34,874 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-01-27 15:23:34,880 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f85bf602/ad1b2601c4f8492db611919332afe7fc/FLAG68a414b51 [2024-01-27 15:23:34,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f85bf602/ad1b2601c4f8492db611919332afe7fc [2024-01-27 15:23:34,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:23:34,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:23:34,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:23:34,894 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:23:34,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:23:34,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:23:34" (1/1) ... [2024-01-27 15:23:34,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30127549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:34, skipping insertion in model container [2024-01-27 15:23:34,899 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:23:34" (1/1) ... [2024-01-27 15:23:34,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:23:35,056 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/chl-name-comparator-trans.wvr.c[4827,4840] [2024-01-27 15:23:35,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:23:35,078 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:23:35,100 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/chl-name-comparator-trans.wvr.c[4827,4840] [2024-01-27 15:23:35,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:23:35,124 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:23:35,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35 WrapperNode [2024-01-27 15:23:35,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:23:35,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:23:35,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:23:35,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:23:35,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,143 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,186 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2024-01-27 15:23:35,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:23:35,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:23:35,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:23:35,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:23:35,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,210 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,244 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 2, 4, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:23:35,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,267 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,270 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:23:35,275 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:23:35,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:23:35,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:23:35,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (1/1) ... [2024-01-27 15:23:35,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:23:35,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:35,326 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 15:23:35,344 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 15:23:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:23:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:23:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:23:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:23:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:23:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:23:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:23:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:23:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:23:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:23:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:23:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:23:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:23:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:23:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:23:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:23:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:23:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:23:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:23:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:23:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:23:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:23:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:23:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:23:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:23:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:23:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:23:35,375 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 15:23:35,471 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:23:35,473 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:23:35,771 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:23:35,771 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:23:36,115 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:23:36,116 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:23:36,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:23:36 BoogieIcfgContainer [2024-01-27 15:23:36,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:23:36,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:23:36,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:23:36,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:23:36,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:23:34" (1/3) ... [2024-01-27 15:23:36,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697b507b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:23:36, skipping insertion in model container [2024-01-27 15:23:36,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:23:35" (2/3) ... [2024-01-27 15:23:36,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697b507b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:23:36, skipping insertion in model container [2024-01-27 15:23:36,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:23:36" (3/3) ... [2024-01-27 15:23:36,124 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-01-27 15:23:36,131 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:23:36,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:23:36,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:23:36,139 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:23:36,208 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:23:36,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 97 flow [2024-01-27 15:23:36,270 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-01-27 15:23:36,270 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:23:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 7/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 15:23:36,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 38 transitions, 97 flow [2024-01-27 15:23:36,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 86 flow [2024-01-27 15:23:36,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:23:36,297 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;@1e9a819e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:23:36,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:23:36,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:23:36,311 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-01-27 15:23:36,311 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:23:36,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:36,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:36,313 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 15:23:36,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash 566723653, now seen corresponding path program 1 times [2024-01-27 15:23:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931820423] [2024-01-27 15:23:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:36,602 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 15:23:36,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:36,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931820423] [2024-01-27 15:23:36,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931820423] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:23:36,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:23:36,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:23:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576578283] [2024-01-27 15:23:36,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:23:36,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:23:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:36,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:23:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:23:36,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:36,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:36,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:36,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:36,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:36,836 INFO L124 PetriNetUnfolderBase]: 466/696 cut-off events. [2024-01-27 15:23:36,836 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-01-27 15:23:36,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 696 events. 466/696 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2428 event pairs, 333 based on Foata normal form. 132/675 useless extension candidates. Maximal degree in co-relation 1177. Up to 679 conditions per place. [2024-01-27 15:23:36,845 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 27 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-01-27 15:23:36,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 134 flow [2024-01-27 15:23:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:23:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:23:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2024-01-27 15:23:36,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:23:36,855 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 2 states and 44 transitions. [2024-01-27 15:23:36,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 134 flow [2024-01-27 15:23:36,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:23:36,861 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 68 flow [2024-01-27 15:23:36,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-01-27 15:23:36,866 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2024-01-27 15:23:36,866 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 68 flow [2024-01-27 15:23:36,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:36,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:36,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:36,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:23:36,867 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 15:23:36,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1846188191, now seen corresponding path program 1 times [2024-01-27 15:23:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:36,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898996751] [2024-01-27 15:23:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:36,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:37,084 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 15:23:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898996751] [2024-01-27 15:23:37,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898996751] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:23:37,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:23:37,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:23:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109363262] [2024-01-27 15:23:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:23:37,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:23:37,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:23:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:23:37,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:37,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 15:23:37,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:37,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:37,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:37,203 INFO L124 PetriNetUnfolderBase]: 466/697 cut-off events. [2024-01-27 15:23:37,203 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:23:37,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 697 events. 466/697 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2434 event pairs, 333 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 1397. Up to 679 conditions per place. [2024-01-27 15:23:37,207 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-27 15:23:37,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 126 flow [2024-01-27 15:23:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:23:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:23:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-27 15:23:37,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-01-27 15:23:37,210 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 68 flow. Second operand 3 states and 50 transitions. [2024-01-27 15:23:37,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 126 flow [2024-01-27 15:23:37,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:23:37,214 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2024-01-27 15:23:37,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-01-27 15:23:37,217 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2024-01-27 15:23:37,217 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2024-01-27 15:23:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 15:23:37,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:37,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:37,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:23:37,220 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 15:23:37,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1978685021, now seen corresponding path program 1 times [2024-01-27 15:23:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229985419] [2024-01-27 15:23:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:37,391 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 15:23:37,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229985419] [2024-01-27 15:23:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229985419] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738099355] [2024-01-27 15:23:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:37,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:37,394 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 15:23:37,403 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 15:23:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:37,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:23:37,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:37,576 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 15:23:37,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:37,597 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 15:23:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738099355] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:37,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:37,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-27 15:23:37,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080223414] [2024-01-27 15:23:37,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:37,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:23:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:23:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:23:37,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:37,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 15:23:37,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:37,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:37,737 INFO L124 PetriNetUnfolderBase]: 466/699 cut-off events. [2024-01-27 15:23:37,737 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:23:37,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 699 events. 466/699 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2418 event pairs, 333 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1408. Up to 679 conditions per place. [2024-01-27 15:23:37,741 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-01-27 15:23:37,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 148 flow [2024-01-27 15:23:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:23:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:23:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-01-27 15:23:37,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2024-01-27 15:23:37,744 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 5 states and 67 transitions. [2024-01-27 15:23:37,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 148 flow [2024-01-27 15:23:37,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:23:37,746 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 102 flow [2024-01-27 15:23:37,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-01-27 15:23:37,747 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-01-27 15:23:37,747 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 102 flow [2024-01-27 15:23:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 15:23:37,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:37,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:37,759 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 15:23:37,958 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 15:23:37,960 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 15:23:37,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 271554205, now seen corresponding path program 2 times [2024-01-27 15:23:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:37,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279934140] [2024-01-27 15:23:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279934140] [2024-01-27 15:23:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279934140] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:23:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:23:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:23:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862773120] [2024-01-27 15:23:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:23:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:23:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:23:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:23:38,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:38,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 15:23:38,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:38,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:38,435 INFO L124 PetriNetUnfolderBase]: 832/1271 cut-off events. [2024-01-27 15:23:38,435 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 15:23:38,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 1271 events. 832/1271 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5423 event pairs, 333 based on Foata normal form. 1/1010 useless extension candidates. Maximal degree in co-relation 2535. Up to 682 conditions per place. [2024-01-27 15:23:38,439 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 42 selfloop transitions, 2 changer transitions 20/68 dead transitions. [2024-01-27 15:23:38,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 305 flow [2024-01-27 15:23:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:23:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:23:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-01-27 15:23:38,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-01-27 15:23:38,442 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 102 flow. Second operand 4 states and 90 transitions. [2024-01-27 15:23:38,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 305 flow [2024-01-27 15:23:38,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 295 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-27 15:23:38,445 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 106 flow [2024-01-27 15:23:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-01-27 15:23:38,446 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-01-27 15:23:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 106 flow [2024-01-27 15:23:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 15:23:38,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:38,447 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:38,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:23:38,447 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 15:23:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1285882536, now seen corresponding path program 1 times [2024-01-27 15:23:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:38,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368239272] [2024-01-27 15:23:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-27 15:23:38,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:38,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368239272] [2024-01-27 15:23:38,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368239272] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:23:38,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:23:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:23:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344513073] [2024-01-27 15:23:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:23:38,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:23:38,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:23:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:23:38,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:38,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 15:23:38,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:38,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:38,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:38,883 INFO L124 PetriNetUnfolderBase]: 1150/1753 cut-off events. [2024-01-27 15:23:38,883 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-01-27 15:23:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3844 conditions, 1753 events. 1150/1753 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8268 event pairs, 493 based on Foata normal form. 1/1489 useless extension candidates. Maximal degree in co-relation 3834. Up to 962 conditions per place. [2024-01-27 15:23:38,889 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 44 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-01-27 15:23:38,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 330 flow [2024-01-27 15:23:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:23:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:23:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-01-27 15:23:38,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:23:38,891 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 106 flow. Second operand 4 states and 88 transitions. [2024-01-27 15:23:38,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 330 flow [2024-01-27 15:23:38,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:23:38,892 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 116 flow [2024-01-27 15:23:38,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-01-27 15:23:38,893 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-01-27 15:23:38,893 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 116 flow [2024-01-27 15:23:38,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 15:23:38,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:38,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:38,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:23:38,894 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 15:23:38,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -398684813, now seen corresponding path program 1 times [2024-01-27 15:23:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:38,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257325639] [2024-01-27 15:23:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:39,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257325639] [2024-01-27 15:23:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257325639] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394458679] [2024-01-27 15:23:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:39,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:39,533 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 15:23:39,537 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 15:23:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:39,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:23:39,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:40,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 71 [2024-01-27 15:23:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:40,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:41,668 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:23:41,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 83 [2024-01-27 15:23:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:41,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394458679] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:41,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:41,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-01-27 15:23:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603484891] [2024-01-27 15:23:41,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:23:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:23:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:23:41,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:41,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 116 flow. Second operand has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 26 states have internal predecessors, (256), 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 15:23:41,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:41,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:41,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:45,937 INFO L124 PetriNetUnfolderBase]: 4240/6814 cut-off events. [2024-01-27 15:23:45,937 INFO L125 PetriNetUnfolderBase]: For 2209/2209 co-relation queries the response was YES. [2024-01-27 15:23:45,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15577 conditions, 6814 events. 4240/6814 cut-off events. For 2209/2209 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 43500 event pairs, 477 based on Foata normal form. 8/6333 useless extension candidates. Maximal degree in co-relation 15566. Up to 1010 conditions per place. [2024-01-27 15:23:45,966 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 285 selfloop transitions, 63 changer transitions 58/410 dead transitions. [2024-01-27 15:23:45,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 410 transitions, 1930 flow [2024-01-27 15:23:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:23:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:23:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 630 transitions. [2024-01-27 15:23:45,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180921052631579 [2024-01-27 15:23:45,969 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 116 flow. Second operand 32 states and 630 transitions. [2024-01-27 15:23:45,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 410 transitions, 1930 flow [2024-01-27 15:23:45,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 410 transitions, 1894 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-27 15:23:45,974 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 667 flow [2024-01-27 15:23:45,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=667, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2024-01-27 15:23:45,975 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 59 predicate places. [2024-01-27 15:23:45,975 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 667 flow [2024-01-27 15:23:45,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.846153846153847) internal successors, (256), 26 states have internal predecessors, (256), 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 15:23:45,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:45,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:45,990 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 15:23:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:23:46,181 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 15:23:46,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -357399399, now seen corresponding path program 2 times [2024-01-27 15:23:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191294421] [2024-01-27 15:23:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191294421] [2024-01-27 15:23:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191294421] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840958623] [2024-01-27 15:23:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:23:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:46,934 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 15:23:46,960 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 15:23:47,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:23:47,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:47,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:23:47,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:47,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:23:47,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:23:47,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:23:47,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 85 [2024-01-27 15:23:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:23:47,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840958623] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:48,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:48,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 31 [2024-01-27 15:23:48,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168114908] [2024-01-27 15:23:48,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:48,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:23:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:23:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:23:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:48,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 667 flow. Second operand has 31 states, 31 states have (on average 9.419354838709678) internal successors, (292), 31 states have internal predecessors, (292), 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 15:23:48,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:48,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:48,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:52,340 INFO L124 PetriNetUnfolderBase]: 7934/12919 cut-off events. [2024-01-27 15:23:52,341 INFO L125 PetriNetUnfolderBase]: For 79464/79512 co-relation queries the response was YES. [2024-01-27 15:23:52,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50941 conditions, 12919 events. 7934/12919 cut-off events. For 79464/79512 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 93052 event pairs, 501 based on Foata normal form. 6/12899 useless extension candidates. Maximal degree in co-relation 50909. Up to 2793 conditions per place. [2024-01-27 15:23:52,555 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 291 selfloop transitions, 146 changer transitions 21/462 dead transitions. [2024-01-27 15:23:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 462 transitions, 3751 flow [2024-01-27 15:23:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:23:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:23:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 498 transitions. [2024-01-27 15:23:52,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095394736842105 [2024-01-27 15:23:52,567 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 667 flow. Second operand 32 states and 498 transitions. [2024-01-27 15:23:52,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 462 transitions, 3751 flow [2024-01-27 15:23:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 462 transitions, 3550 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-01-27 15:23:52,958 INFO L231 Difference]: Finished difference. Result has 135 places, 221 transitions, 2087 flow [2024-01-27 15:23:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2087, PETRI_PLACES=135, PETRI_TRANSITIONS=221} [2024-01-27 15:23:52,958 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2024-01-27 15:23:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 221 transitions, 2087 flow [2024-01-27 15:23:52,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.419354838709678) internal successors, (292), 31 states have internal predecessors, (292), 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 15:23:52,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:52,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:23:53,170 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 15:23:53,171 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 15:23:53,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -873550213, now seen corresponding path program 3 times [2024-01-27 15:23:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351816487] [2024-01-27 15:23:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:53,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351816487] [2024-01-27 15:23:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351816487] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742528597] [2024-01-27 15:23:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:23:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:53,725 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 15:23:53,751 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 15:23:53,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:23:53,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:53,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:23:53,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:54,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2024-01-27 15:23:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:54,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:55,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:23:55,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 108 [2024-01-27 15:23:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:23:55,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742528597] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:55,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:55,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2024-01-27 15:23:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185181196] [2024-01-27 15:23:55,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:55,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:23:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:23:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:23:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:23:55,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 221 transitions, 2087 flow. Second operand has 26 states, 26 states have (on average 9.692307692307692) internal successors, (252), 26 states have internal predecessors, (252), 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 15:23:55,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:55,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:23:55,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:03,875 INFO L124 PetriNetUnfolderBase]: 16751/27929 cut-off events. [2024-01-27 15:24:03,876 INFO L125 PetriNetUnfolderBase]: For 316255/316379 co-relation queries the response was YES. [2024-01-27 15:24:03,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135695 conditions, 27929 events. 16751/27929 cut-off events. For 316255/316379 co-relation queries the response was YES. Maximal size of possible extension queue 1320. Compared 233323 event pairs, 2828 based on Foata normal form. 18/27853 useless extension candidates. Maximal degree in co-relation 135649. Up to 6318 conditions per place. [2024-01-27 15:24:04,076 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 438 selfloop transitions, 384 changer transitions 106/932 dead transitions. [2024-01-27 15:24:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 932 transitions, 10258 flow [2024-01-27 15:24:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-27 15:24:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-27 15:24:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 867 transitions. [2024-01-27 15:24:04,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45631578947368423 [2024-01-27 15:24:04,080 INFO L175 Difference]: Start difference. First operand has 135 places, 221 transitions, 2087 flow. Second operand 50 states and 867 transitions. [2024-01-27 15:24:04,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 932 transitions, 10258 flow [2024-01-27 15:24:05,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 932 transitions, 9767 flow, removed 226 selfloop flow, removed 5 redundant places. [2024-01-27 15:24:05,324 INFO L231 Difference]: Finished difference. Result has 202 places, 523 transitions, 6921 flow [2024-01-27 15:24:05,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=6921, PETRI_PLACES=202, PETRI_TRANSITIONS=523} [2024-01-27 15:24:05,325 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 165 predicate places. [2024-01-27 15:24:05,325 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 523 transitions, 6921 flow [2024-01-27 15:24:05,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.692307692307692) internal successors, (252), 26 states have internal predecessors, (252), 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 15:24:05,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:05,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:05,351 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 15:24:05,537 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 15:24:05,537 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 15:24:05,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1210803683, now seen corresponding path program 4 times [2024-01-27 15:24:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:05,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626493438] [2024-01-27 15:24:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626493438] [2024-01-27 15:24:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626493438] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090587822] [2024-01-27 15:24:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:24:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:06,188 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 15:24:06,248 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 15:24:06,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:24:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:06,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:24:06,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:06,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 101 [2024-01-27 15:24:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:06,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:07,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:07,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 80 [2024-01-27 15:24:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090587822] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:07,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:07,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-01-27 15:24:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624685865] [2024-01-27 15:24:07,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:24:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:24:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:24:07,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:24:07,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 523 transitions, 6921 flow. Second operand has 22 states, 22 states have (on average 10.272727272727273) internal successors, (226), 22 states have internal predecessors, (226), 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 15:24:07,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:07,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:24:07,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:17,629 INFO L124 PetriNetUnfolderBase]: 22956/38602 cut-off events. [2024-01-27 15:24:17,630 INFO L125 PetriNetUnfolderBase]: For 694558/694580 co-relation queries the response was YES. [2024-01-27 15:24:17,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217357 conditions, 38602 events. 22956/38602 cut-off events. For 694558/694580 co-relation queries the response was YES. Maximal size of possible extension queue 1881. Compared 340882 event pairs, 4754 based on Foata normal form. 38/38576 useless extension candidates. Maximal degree in co-relation 217289. Up to 9249 conditions per place. [2024-01-27 15:24:18,132 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 704 selfloop transitions, 375 changer transitions 128/1211 dead transitions. [2024-01-27 15:24:18,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1211 transitions, 18587 flow [2024-01-27 15:24:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:24:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:24:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 526 transitions. [2024-01-27 15:24:18,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943609022556391 [2024-01-27 15:24:18,135 INFO L175 Difference]: Start difference. First operand has 202 places, 523 transitions, 6921 flow. Second operand 28 states and 526 transitions. [2024-01-27 15:24:18,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1211 transitions, 18587 flow [2024-01-27 15:24:26,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1211 transitions, 15368 flow, removed 1608 selfloop flow, removed 4 redundant places. [2024-01-27 15:24:26,379 INFO L231 Difference]: Finished difference. Result has 225 places, 685 transitions, 8392 flow [2024-01-27 15:24:26,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8392, PETRI_PLACES=225, PETRI_TRANSITIONS=685} [2024-01-27 15:24:26,380 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 188 predicate places. [2024-01-27 15:24:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 685 transitions, 8392 flow [2024-01-27 15:24:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.272727272727273) internal successors, (226), 22 states have internal predecessors, (226), 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 15:24:26,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:26,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:24:26,591 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 15:24:26,591 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 15:24:26,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1495004891, now seen corresponding path program 5 times [2024-01-27 15:24:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:26,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862186761] [2024-01-27 15:24:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862186761] [2024-01-27 15:24:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862186761] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139287046] [2024-01-27 15:24:27,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:27,079 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 15:24:27,081 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 15:24:27,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:24:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:27,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:24:27,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:27,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 98 [2024-01-27 15:24:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:27,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:28,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:24:28,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 62 [2024-01-27 15:24:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139287046] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:28,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-01-27 15:24:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181159669] [2024-01-27 15:24:28,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:24:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:24:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:24:28,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:24:28,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 685 transitions, 8392 flow. Second operand has 27 states, 27 states have (on average 9.666666666666666) internal successors, (261), 27 states have internal predecessors, (261), 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 15:24:28,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:28,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:24:28,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:37,613 INFO L124 PetriNetUnfolderBase]: 23605/39613 cut-off events. [2024-01-27 15:24:37,613 INFO L125 PetriNetUnfolderBase]: For 575829/575937 co-relation queries the response was YES. [2024-01-27 15:24:38,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207068 conditions, 39613 events. 23605/39613 cut-off events. For 575829/575937 co-relation queries the response was YES. Maximal size of possible extension queue 1977. Compared 351368 event pairs, 8882 based on Foata normal form. 25/39492 useless extension candidates. Maximal degree in co-relation 206994. Up to 20857 conditions per place. [2024-01-27 15:24:38,167 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 571 selfloop transitions, 296 changer transitions 65/936 dead transitions. [2024-01-27 15:24:38,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 936 transitions, 12822 flow [2024-01-27 15:24:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:24:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:24:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 349 transitions. [2024-01-27 15:24:38,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45921052631578946 [2024-01-27 15:24:38,169 INFO L175 Difference]: Start difference. First operand has 225 places, 685 transitions, 8392 flow. Second operand 20 states and 349 transitions. [2024-01-27 15:24:38,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 936 transitions, 12822 flow [2024-01-27 15:24:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 936 transitions, 12540 flow, removed 113 selfloop flow, removed 11 redundant places. [2024-01-27 15:24:42,845 INFO L231 Difference]: Finished difference. Result has 237 places, 725 transitions, 9395 flow [2024-01-27 15:24:42,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8134, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9395, PETRI_PLACES=237, PETRI_TRANSITIONS=725} [2024-01-27 15:24:42,846 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 200 predicate places. [2024-01-27 15:24:42,847 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 725 transitions, 9395 flow [2024-01-27 15:24:42,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.666666666666666) internal successors, (261), 27 states have internal predecessors, (261), 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 15:24:42,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:42,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:24:42,860 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 15:24:43,059 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 15:24:43,059 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 15:24:43,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1414223227, now seen corresponding path program 6 times [2024-01-27 15:24:43,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:24:43,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210079919] [2024-01-27 15:24:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:24:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:43,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:24:43,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210079919] [2024-01-27 15:24:43,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210079919] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:43,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658852147] [2024-01-27 15:24:43,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:24:43,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:24:43,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:43,658 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 15:24:43,659 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 15:24:43,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:24:43,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:43,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:24:43,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:43,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:24:43,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:24:43,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:24:44,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 85 [2024-01-27 15:24:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:24:44,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:24:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658852147] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:45,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:24:45,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 31 [2024-01-27 15:24:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68395291] [2024-01-27 15:24:45,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:24:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:24:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:24:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:24:45,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-27 15:24:45,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 725 transitions, 9395 flow. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 31 states have internal predecessors, (290), 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 15:24:45,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:45,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-27 15:24:45,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand