./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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-nzb-file-subst.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.graphml --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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:04:14,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:04:14,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:04:14,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:04:14,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:04:14,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:04:14,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:04:14,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:04:14,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:04:14,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:04:14,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:04:14,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:04:14,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:04:14,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:04:14,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:04:14,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:04:14,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:04:14,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:04:14,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:04:14,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:04:14,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:04:14,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:04:14,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:04:14,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:04:14,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:04:14,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:04:14,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:04:14,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:04:14,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:04:14,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:04:14,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:04:14,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:04:14,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:04:14,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:04:14,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:04:14,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:04:14,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:04:14,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:04:14,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:04:14,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:04:14,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:04:14,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:04:14,471 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:04:14,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:04:14,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:04:14,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:04:14,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:04:14,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:04:14,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:04:14,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:04:14,475 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:04:14,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:04:14,476 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:04:14,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:04:14,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:04:14,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:04:14,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:04:14,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:04:14,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:04:14,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:04:14,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:04:14,478 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:04:14,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:04:14,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:04:14,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:04:14,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:04:14,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:04:14,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:04:14,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:04:14,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:04:14,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:04:14,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:04:14,480 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:04:14,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:04:14,480 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:04:14,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:04:14,481 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:04:14,481 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:04:14,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:04:14,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:04:14,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:04:14,833 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:04:14,834 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:04:14,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-09-01 12:04:16,082 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:04:16,331 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:04:16,332 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-09-01 12:04:16,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a4e27ab/bf40f1f4ed7244caa2f3b58cd835dd83/FLAG4ad13d1f0 [2023-09-01 12:04:16,354 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a4e27ab/bf40f1f4ed7244caa2f3b58cd835dd83 [2023-09-01 12:04:16,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:04:16,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:04:16,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:04:16,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:04:16,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:04:16,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7235b497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16, skipping insertion in model container [2023-09-01 12:04:16,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:04:16,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:04:16,614 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-09-01 12:04:16,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:04:16,636 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:04:16,682 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-09-01 12:04:16,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:04:16,697 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:04:16,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16 WrapperNode [2023-09-01 12:04:16,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:04:16,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:04:16,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:04:16,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:04:16,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,782 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-09-01 12:04:16,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:04:16,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:04:16,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:04:16,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:04:16,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:04:16,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:04:16,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:04:16,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:04:16,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (1/1) ... [2023-09-01 12:04:16,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:04:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:16,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:04:16,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:04:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:04:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:04:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:04:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:04:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:04:16,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:04:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:04:16,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:04:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:04:16,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:04:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:04:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:04:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:04:16,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:04:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:04:16,991 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:04:17,132 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:04:17,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:04:17,972 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:04:17,994 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:04:17,994 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 12:04:18,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:04:18 BoogieIcfgContainer [2023-09-01 12:04:18,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:04:18,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:04:18,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:04:18,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:04:18,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:04:16" (1/3) ... [2023-09-01 12:04:18,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191ceb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:04:18, skipping insertion in model container [2023-09-01 12:04:18,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:04:16" (2/3) ... [2023-09-01 12:04:18,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191ceb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:04:18, skipping insertion in model container [2023-09-01 12:04:18,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:04:18" (3/3) ... [2023-09-01 12:04:18,008 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-09-01 12:04:18,016 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:04:18,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:04:18,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:04:18,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:04:18,225 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:04:18,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 717 transitions, 1458 flow [2023-09-01 12:04:18,616 INFO L130 PetriNetUnfolder]: 73/714 cut-off events. [2023-09-01 12:04:18,616 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:04:18,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 714 events. 73/714 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2388 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-09-01 12:04:18,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 717 transitions, 1458 flow [2023-09-01 12:04:18,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 704 transitions, 1426 flow [2023-09-01 12:04:18,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:04:18,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 704 transitions, 1426 flow [2023-09-01 12:04:18,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 704 transitions, 1426 flow [2023-09-01 12:04:18,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 704 transitions, 1426 flow [2023-09-01 12:04:18,870 INFO L130 PetriNetUnfolder]: 73/704 cut-off events. [2023-09-01 12:04:18,871 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:04:18,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 704 events. 73/704 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-09-01 12:04:18,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-09-01 12:04:45,818 INFO L134 LiptonReduction]: Checked pairs total: 150057 [2023-09-01 12:04:45,818 INFO L136 LiptonReduction]: Total number of compositions: 891 [2023-09-01 12:04:45,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:04:45,836 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=LoopsAndPotentialCycles, 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;@62fb64ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:04:45,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:04:45,847 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-09-01 12:04:45,847 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:04:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:45,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:45,849 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)] === [2023-09-01 12:04:45,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1427696023, now seen corresponding path program 1 times [2023-09-01 12:04:45,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:45,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907978290] [2023-09-01 12:04:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:45,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:04:46,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907978290] [2023-09-01 12:04:46,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907978290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:04:46,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:04:46,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:04:46,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489179730] [2023-09-01 12:04:46,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:04:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:04:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:04:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:04:46,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 661 out of 1608 [2023-09-01 12:04:46,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 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) [2023-09-01 12:04:46,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:46,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 661 of 1608 [2023-09-01 12:04:46,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:47,174 INFO L130 PetriNetUnfolder]: 2608/3503 cut-off events. [2023-09-01 12:04:47,174 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-09-01 12:04:47,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7267 conditions, 3503 events. 2608/3503 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12504 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6748. Up to 3501 conditions per place. [2023-09-01 12:04:47,193 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-09-01 12:04:47,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 218 flow [2023-09-01 12:04:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:04:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:04:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2037 transitions. [2023-09-01 12:04:47,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-09-01 12:04:47,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2037 transitions. [2023-09-01 12:04:47,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2037 transitions. [2023-09-01 12:04:47,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:47,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2037 transitions. [2023-09-01 12:04:47,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 679.0) internal successors, (2037), 3 states have internal predecessors, (2037), 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) [2023-09-01 12:04:47,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:04:47,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:04:47,247 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2037 transitions. [2023-09-01 12:04:47,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 218 flow [2023-09-01 12:04:47,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:04:47,256 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 132 flow [2023-09-01 12:04:47,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2023-09-01 12:04:47,261 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-09-01 12:04:47,261 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 132 flow [2023-09-01 12:04:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 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) [2023-09-01 12:04:47,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:47,263 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] [2023-09-01 12:04:47,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:04:47,264 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)] === [2023-09-01 12:04:47,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2065041558, now seen corresponding path program 1 times [2023-09-01 12:04:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745026582] [2023-09-01 12:04:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:04:47,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745026582] [2023-09-01 12:04:47,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745026582] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:47,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628065549] [2023-09-01 12:04:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:47,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:47,469 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) [2023-09-01 12:04:47,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:04:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:04:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:04:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:04:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:04:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628065549] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:04:47,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:04:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-09-01 12:04:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597276639] [2023-09-01 12:04:47,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:04:47,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:04:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:04:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:04:47,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-09-01 12:04:47,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 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) [2023-09-01 12:04:47,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:47,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-09-01 12:04:47,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:48,673 INFO L130 PetriNetUnfolder]: 2608/3512 cut-off events. [2023-09-01 12:04:48,674 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 12:04:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 3512 events. 2608/3512 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12508 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7112. Up to 3501 conditions per place. [2023-09-01 12:04:48,691 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 44 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2023-09-01 12:04:48,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 286 flow [2023-09-01 12:04:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:04:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:04:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3998 transitions. [2023-09-01 12:04:48,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2023-09-01 12:04:48,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3998 transitions. [2023-09-01 12:04:48,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3998 transitions. [2023-09-01 12:04:48,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:48,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3998 transitions. [2023-09-01 12:04:48,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 666.3333333333334) internal successors, (3998), 6 states have internal predecessors, (3998), 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) [2023-09-01 12:04:48,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 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) [2023-09-01 12:04:48,735 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 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) [2023-09-01 12:04:48,736 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 132 flow. Second operand 6 states and 3998 transitions. [2023-09-01 12:04:48,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 286 flow [2023-09-01 12:04:48,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:04:48,739 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 222 flow [2023-09-01 12:04:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-09-01 12:04:48,740 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-09-01 12:04:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 222 flow [2023-09-01 12:04:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 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) [2023-09-01 12:04:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:48,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:04:48,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:48,951 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)] === [2023-09-01 12:04:48,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 773664469, now seen corresponding path program 2 times [2023-09-01 12:04:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109949064] [2023-09-01 12:04:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:04:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:49,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109949064] [2023-09-01 12:04:49,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109949064] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780378277] [2023-09-01 12:04:49,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:04:49,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:49,183 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) [2023-09-01 12:04:49,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:04:49,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:04:49,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:04:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:04:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:04:51,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:04:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780378277] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:04:51,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:04:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-09-01 12:04:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994303698] [2023-09-01 12:04:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:04:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:04:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:04:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:04:51,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-09-01 12:04:51,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 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) [2023-09-01 12:04:51,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:51,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-09-01 12:04:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:52,744 INFO L130 PetriNetUnfolder]: 2934/4017 cut-off events. [2023-09-01 12:04:52,745 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 12:04:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8213 conditions, 4017 events. 2934/4017 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15676 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8125. Up to 3431 conditions per place. [2023-09-01 12:04:52,767 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 96 selfloop transitions, 2 changer transitions 7/105 dead transitions. [2023-09-01 12:04:52,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 536 flow [2023-09-01 12:04:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:04:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:04:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3289 transitions. [2023-09-01 12:04:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090796019900497 [2023-09-01 12:04:52,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3289 transitions. [2023-09-01 12:04:52,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3289 transitions. [2023-09-01 12:04:52,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:52,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3289 transitions. [2023-09-01 12:04:52,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 657.8) internal successors, (3289), 5 states have internal predecessors, (3289), 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) [2023-09-01 12:04:52,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:04:52,800 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:04:52,801 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 222 flow. Second operand 5 states and 3289 transitions. [2023-09-01 12:04:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 536 flow [2023-09-01 12:04:52,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 512 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 12:04:52,804 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 213 flow [2023-09-01 12:04:52,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-09-01 12:04:52,805 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-09-01 12:04:52,805 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 213 flow [2023-09-01 12:04:52,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 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) [2023-09-01 12:04:52,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:52,807 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:52,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:53,013 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,SelfDestructingSolverStorable2 [2023-09-01 12:04:53,014 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)] === [2023-09-01 12:04:53,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1680310845, now seen corresponding path program 3 times [2023-09-01 12:04:53,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:53,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018230231] [2023-09-01 12:04:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:53,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:04:53,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018230231] [2023-09-01 12:04:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018230231] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630581986] [2023-09-01 12:04:53,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:04:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:53,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:53,216 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) [2023-09-01 12:04:53,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:04:53,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:04:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:04:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:04:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:04:54,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:04:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630581986] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:04:54,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:04:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-09-01 12:04:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984231557] [2023-09-01 12:04:54,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:04:54,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:04:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:04:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:04:54,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-09-01 12:04:54,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 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) [2023-09-01 12:04:54,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:54,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-09-01 12:04:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:56,301 INFO L130 PetriNetUnfolder]: 3124/4357 cut-off events. [2023-09-01 12:04:56,301 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2023-09-01 12:04:56,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 4357 events. 3124/4357 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18094 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9371. Up to 3869 conditions per place. [2023-09-01 12:04:56,324 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 100 selfloop transitions, 3 changer transitions 7/110 dead transitions. [2023-09-01 12:04:56,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 555 flow [2023-09-01 12:04:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:04:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:04:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3293 transitions. [2023-09-01 12:04:56,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095771144278607 [2023-09-01 12:04:56,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3293 transitions. [2023-09-01 12:04:56,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3293 transitions. [2023-09-01 12:04:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3293 transitions. [2023-09-01 12:04:56,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.6) internal successors, (3293), 5 states have internal predecessors, (3293), 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) [2023-09-01 12:04:56,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:04:56,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:04:56,359 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 213 flow. Second operand 5 states and 3293 transitions. [2023-09-01 12:04:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 555 flow [2023-09-01 12:04:56,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 546 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 12:04:56,365 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 230 flow [2023-09-01 12:04:56,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-09-01 12:04:56,368 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-09-01 12:04:56,368 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 230 flow [2023-09-01 12:04:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 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) [2023-09-01 12:04:56,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:56,370 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:56,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:56,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:56,576 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)] === [2023-09-01 12:04:56,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257897, now seen corresponding path program 4 times [2023-09-01 12:04:56,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:56,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128049025] [2023-09-01 12:04:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:04:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:56,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128049025] [2023-09-01 12:04:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128049025] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304060712] [2023-09-01 12:04:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:04:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:56,802 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) [2023-09-01 12:04:56,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:04:57,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:04:57,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:04:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:04:57,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:04:57,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:04:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:04:57,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304060712] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:04:57,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:04:57,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 12:04:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771016042] [2023-09-01 12:04:57,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:04:57,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:04:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:04:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:04:57,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-09-01 12:04:57,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 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) [2023-09-01 12:04:57,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:57,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-09-01 12:04:57,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:58,184 INFO L130 PetriNetUnfolder]: 3123/4352 cut-off events. [2023-09-01 12:04:58,184 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2023-09-01 12:04:58,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 4352 events. 3123/4352 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17812 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 9879. Up to 4338 conditions per place. [2023-09-01 12:04:58,214 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 46 selfloop transitions, 18 changer transitions 0/64 dead transitions. [2023-09-01 12:04:58,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 376 flow [2023-09-01 12:04:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:04:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:04:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4650 transitions. [2023-09-01 12:04:58,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131130063965885 [2023-09-01 12:04:58,226 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4650 transitions. [2023-09-01 12:04:58,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4650 transitions. [2023-09-01 12:04:58,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:58,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4650 transitions. [2023-09-01 12:04:58,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 664.2857142857143) internal successors, (4650), 7 states have internal predecessors, (4650), 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) [2023-09-01 12:04:58,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 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) [2023-09-01 12:04:58,254 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 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) [2023-09-01 12:04:58,255 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 230 flow. Second operand 7 states and 4650 transitions. [2023-09-01 12:04:58,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 376 flow [2023-09-01 12:04:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 370 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:04:58,260 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 292 flow [2023-09-01 12:04:58,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-09-01 12:04:58,263 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-09-01 12:04:58,264 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 292 flow [2023-09-01 12:04:58,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 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) [2023-09-01 12:04:58,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:58,267 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:58,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:58,475 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)] === [2023-09-01 12:04:58,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -472303414, now seen corresponding path program 5 times [2023-09-01 12:04:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:58,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124746727] [2023-09-01 12:04:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:00,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124746727] [2023-09-01 12:05:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124746727] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:05:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244880956] [2023-09-01 12:05:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:00,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:05:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:05:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:05:00,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-09-01 12:05:00,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:00,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:00,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-09-01 12:05:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:02,626 INFO L130 PetriNetUnfolder]: 7479/10347 cut-off events. [2023-09-01 12:05:02,626 INFO L131 PetriNetUnfolder]: For 1820/1820 co-relation queries the response was YES. [2023-09-01 12:05:02,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22274 conditions, 10347 events. 7479/10347 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 51307 event pairs, 1252 based on Foata normal form. 1/8396 useless extension candidates. Maximal degree in co-relation 22161. Up to 3749 conditions per place. [2023-09-01 12:05:02,675 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 156 selfloop transitions, 42 changer transitions 1/199 dead transitions. [2023-09-01 12:05:02,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 199 transitions, 1028 flow [2023-09-01 12:05:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:05:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:05:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4632 transitions. [2023-09-01 12:05:02,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115138592750533 [2023-09-01 12:05:02,690 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4632 transitions. [2023-09-01 12:05:02,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4632 transitions. [2023-09-01 12:05:02,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:02,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4632 transitions. [2023-09-01 12:05:02,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 661.7142857142857) internal successors, (4632), 7 states have internal predecessors, (4632), 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) [2023-09-01 12:05:02,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 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) [2023-09-01 12:05:02,717 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 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) [2023-09-01 12:05:02,718 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 292 flow. Second operand 7 states and 4632 transitions. [2023-09-01 12:05:02,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 199 transitions, 1028 flow [2023-09-01 12:05:02,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 199 transitions, 992 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 12:05:02,726 INFO L231 Difference]: Finished difference. Result has 71 places, 107 transitions, 583 flow [2023-09-01 12:05:02,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=71, PETRI_TRANSITIONS=107} [2023-09-01 12:05:02,729 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-09-01 12:05:02,729 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 107 transitions, 583 flow [2023-09-01 12:05:02,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:02,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:02,730 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:02,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:05:02,731 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)] === [2023-09-01 12:05:02,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash 952440716, now seen corresponding path program 6 times [2023-09-01 12:05:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:02,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250645952] [2023-09-01 12:05:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:03,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:03,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250645952] [2023-09-01 12:05:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250645952] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:03,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:05:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473170768] [2023-09-01 12:05:03,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:05:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:05:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:05:04,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-09-01 12:05:04,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:04,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:04,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-09-01 12:05:04,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:06,544 INFO L130 PetriNetUnfolder]: 9673/13376 cut-off events. [2023-09-01 12:05:06,545 INFO L131 PetriNetUnfolder]: For 9800/9800 co-relation queries the response was YES. [2023-09-01 12:05:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 13376 events. 9673/13376 cut-off events. For 9800/9800 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67067 event pairs, 2739 based on Foata normal form. 1/11107 useless extension candidates. Maximal degree in co-relation 38175. Up to 7196 conditions per place. [2023-09-01 12:05:06,633 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 151 selfloop transitions, 47 changer transitions 2/200 dead transitions. [2023-09-01 12:05:06,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 200 transitions, 1371 flow [2023-09-01 12:05:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:05:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:05:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3294 transitions. [2023-09-01 12:05:06,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097014925373134 [2023-09-01 12:05:06,643 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3294 transitions. [2023-09-01 12:05:06,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3294 transitions. [2023-09-01 12:05:06,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:06,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3294 transitions. [2023-09-01 12:05:06,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.8) internal successors, (3294), 5 states have internal predecessors, (3294), 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) [2023-09-01 12:05:06,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:06,661 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:06,661 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 583 flow. Second operand 5 states and 3294 transitions. [2023-09-01 12:05:06,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 200 transitions, 1371 flow [2023-09-01 12:05:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 200 transitions, 1363 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 12:05:06,752 INFO L231 Difference]: Finished difference. Result has 79 places, 144 transitions, 1035 flow [2023-09-01 12:05:06,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=79, PETRI_TRANSITIONS=144} [2023-09-01 12:05:06,754 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-09-01 12:05:06,754 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 144 transitions, 1035 flow [2023-09-01 12:05:06,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:06,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:06,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:06,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:05:06,756 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)] === [2023-09-01 12:05:06,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1010676078, now seen corresponding path program 7 times [2023-09-01 12:05:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:06,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609038479] [2023-09-01 12:05:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:08,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609038479] [2023-09-01 12:05:08,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609038479] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:08,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:08,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:05:08,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374872532] [2023-09-01 12:05:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:08,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:05:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:05:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:05:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-09-01 12:05:08,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 144 transitions, 1035 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:08,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:08,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-09-01 12:05:08,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:11,216 INFO L130 PetriNetUnfolder]: 10088/14013 cut-off events. [2023-09-01 12:05:11,217 INFO L131 PetriNetUnfolder]: For 18963/18963 co-relation queries the response was YES. [2023-09-01 12:05:11,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44718 conditions, 14013 events. 10088/14013 cut-off events. For 18963/18963 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71621 event pairs, 4629 based on Foata normal form. 1/11640 useless extension candidates. Maximal degree in co-relation 44614. Up to 11506 conditions per place. [2023-09-01 12:05:11,321 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 198 selfloop transitions, 43 changer transitions 2/243 dead transitions. [2023-09-01 12:05:11,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 243 transitions, 2044 flow [2023-09-01 12:05:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:05:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:05:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3304 transitions. [2023-09-01 12:05:11,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109452736318408 [2023-09-01 12:05:11,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3304 transitions. [2023-09-01 12:05:11,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3304 transitions. [2023-09-01 12:05:11,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:11,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3304 transitions. [2023-09-01 12:05:11,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 660.8) internal successors, (3304), 5 states have internal predecessors, (3304), 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) [2023-09-01 12:05:11,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:11,516 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:11,516 INFO L175 Difference]: Start difference. First operand has 79 places, 144 transitions, 1035 flow. Second operand 5 states and 3304 transitions. [2023-09-01 12:05:11,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 243 transitions, 2044 flow [2023-09-01 12:05:11,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 243 transitions, 2032 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-09-01 12:05:11,703 INFO L231 Difference]: Finished difference. Result has 86 places, 171 transitions, 1464 flow [2023-09-01 12:05:11,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1464, PETRI_PLACES=86, PETRI_TRANSITIONS=171} [2023-09-01 12:05:11,705 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-09-01 12:05:11,705 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 171 transitions, 1464 flow [2023-09-01 12:05:11,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:11,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:11,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:11,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:05:11,707 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)] === [2023-09-01 12:05:11,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1354860510, now seen corresponding path program 8 times [2023-09-01 12:05:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:11,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100725274] [2023-09-01 12:05:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:11,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:12,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:12,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100725274] [2023-09-01 12:05:12,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100725274] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:12,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:12,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:05:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008471024] [2023-09-01 12:05:12,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:12,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:05:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:05:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:05:13,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-09-01 12:05:13,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 171 transitions, 1464 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:13,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:13,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-09-01 12:05:13,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:15,910 INFO L130 PetriNetUnfolder]: 10233/14236 cut-off events. [2023-09-01 12:05:15,910 INFO L131 PetriNetUnfolder]: For 27028/27028 co-relation queries the response was YES. [2023-09-01 12:05:15,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49716 conditions, 14236 events. 10233/14236 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74045 event pairs, 2601 based on Foata normal form. 1/11817 useless extension candidates. Maximal degree in co-relation 49608. Up to 7212 conditions per place. [2023-09-01 12:05:16,017 INFO L137 encePairwiseOnDemand]: 1597/1608 looper letters, 190 selfloop transitions, 47 changer transitions 2/239 dead transitions. [2023-09-01 12:05:16,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 239 transitions, 2269 flow [2023-09-01 12:05:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:05:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:05:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3299 transitions. [2023-09-01 12:05:16,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103233830845771 [2023-09-01 12:05:16,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3299 transitions. [2023-09-01 12:05:16,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3299 transitions. [2023-09-01 12:05:16,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:16,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3299 transitions. [2023-09-01 12:05:16,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 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) [2023-09-01 12:05:16,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:16,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:16,047 INFO L175 Difference]: Start difference. First operand has 86 places, 171 transitions, 1464 flow. Second operand 5 states and 3299 transitions. [2023-09-01 12:05:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 239 transitions, 2269 flow [2023-09-01 12:05:16,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 239 transitions, 2261 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 12:05:16,410 INFO L231 Difference]: Finished difference. Result has 92 places, 180 transitions, 1699 flow [2023-09-01 12:05:16,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=92, PETRI_TRANSITIONS=180} [2023-09-01 12:05:16,411 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-09-01 12:05:16,411 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 180 transitions, 1699 flow [2023-09-01 12:05:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 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) [2023-09-01 12:05:16,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:16,412 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:05:16,413 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)] === [2023-09-01 12:05:16,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1151516539, now seen corresponding path program 1 times [2023-09-01 12:05:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579561783] [2023-09-01 12:05:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:16,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:16,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579561783] [2023-09-01 12:05:16,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579561783] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:16,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:16,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:05:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809115865] [2023-09-01 12:05:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:05:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:05:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:05:16,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:05:16,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 180 transitions, 1699 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:16,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:16,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:05:16,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:20,353 INFO L130 PetriNetUnfolder]: 14718/20390 cut-off events. [2023-09-01 12:05:20,353 INFO L131 PetriNetUnfolder]: For 46162/46162 co-relation queries the response was YES. [2023-09-01 12:05:20,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74089 conditions, 20390 events. 14718/20390 cut-off events. For 46162/46162 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 106906 event pairs, 5671 based on Foata normal form. 280/17004 useless extension candidates. Maximal degree in co-relation 73978. Up to 13705 conditions per place. [2023-09-01 12:05:20,530 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 223 selfloop transitions, 12 changer transitions 0/235 dead transitions. [2023-09-01 12:05:20,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 235 transitions, 2581 flow [2023-09-01 12:05:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:05:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:05:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2074 transitions. [2023-09-01 12:05:20,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-09-01 12:05:20,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2074 transitions. [2023-09-01 12:05:20,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2074 transitions. [2023-09-01 12:05:20,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:20,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2074 transitions. [2023-09-01 12:05:20,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 691.3333333333334) internal successors, (2074), 3 states have internal predecessors, (2074), 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) [2023-09-01 12:05:20,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:20,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:20,545 INFO L175 Difference]: Start difference. First operand has 92 places, 180 transitions, 1699 flow. Second operand 3 states and 2074 transitions. [2023-09-01 12:05:20,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 235 transitions, 2581 flow [2023-09-01 12:05:21,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 235 transitions, 2490 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-09-01 12:05:21,162 INFO L231 Difference]: Finished difference. Result has 94 places, 170 transitions, 1544 flow [2023-09-01 12:05:21,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=94, PETRI_TRANSITIONS=170} [2023-09-01 12:05:21,163 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-09-01 12:05:21,163 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 170 transitions, 1544 flow [2023-09-01 12:05:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:21,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:05:21,164 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)] === [2023-09-01 12:05:21,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -977446447, now seen corresponding path program 1 times [2023-09-01 12:05:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969506759] [2023-09-01 12:05:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:21,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969506759] [2023-09-01 12:05:21,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969506759] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:21,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:21,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:05:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091243320] [2023-09-01 12:05:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:21,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:05:21,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:05:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:05:21,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:05:21,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 170 transitions, 1544 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:21,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:21,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:05:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:25,412 INFO L130 PetriNetUnfolder]: 19754/27154 cut-off events. [2023-09-01 12:05:25,412 INFO L131 PetriNetUnfolder]: For 60626/60626 co-relation queries the response was YES. [2023-09-01 12:05:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95880 conditions, 27154 events. 19754/27154 cut-off events. For 60626/60626 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 142925 event pairs, 7741 based on Foata normal form. 0/22232 useless extension candidates. Maximal degree in co-relation 95768. Up to 20577 conditions per place. [2023-09-01 12:05:25,699 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 219 selfloop transitions, 8 changer transitions 0/227 dead transitions. [2023-09-01 12:05:25,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 227 transitions, 2405 flow [2023-09-01 12:05:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:05:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:05:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2072 transitions. [2023-09-01 12:05:25,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295190713101161 [2023-09-01 12:05:25,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2072 transitions. [2023-09-01 12:05:25,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2072 transitions. [2023-09-01 12:05:25,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:25,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2072 transitions. [2023-09-01 12:05:25,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 690.6666666666666) internal successors, (2072), 3 states have internal predecessors, (2072), 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) [2023-09-01 12:05:25,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:25,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:25,711 INFO L175 Difference]: Start difference. First operand has 94 places, 170 transitions, 1544 flow. Second operand 3 states and 2072 transitions. [2023-09-01 12:05:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 227 transitions, 2405 flow [2023-09-01 12:05:26,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 227 transitions, 2388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:05:26,274 INFO L231 Difference]: Finished difference. Result has 96 places, 171 transitions, 1562 flow [2023-09-01 12:05:26,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1562, PETRI_PLACES=96, PETRI_TRANSITIONS=171} [2023-09-01 12:05:26,275 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-09-01 12:05:26,275 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 171 transitions, 1562 flow [2023-09-01 12:05:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:26,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:26,276 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 12:05:26,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:05:26,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1136703417, now seen corresponding path program 1 times [2023-09-01 12:05:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:26,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931029942] [2023-09-01 12:05:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:26,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931029942] [2023-09-01 12:05:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931029942] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:26,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:26,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:05:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132372701] [2023-09-01 12:05:26,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:05:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:05:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:05:26,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:05:26,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 171 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:26,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:26,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:05:26,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:31,262 INFO L130 PetriNetUnfolder]: 21302/29548 cut-off events. [2023-09-01 12:05:31,263 INFO L131 PetriNetUnfolder]: For 67464/67464 co-relation queries the response was YES. [2023-09-01 12:05:31,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103929 conditions, 29548 events. 21302/29548 cut-off events. For 67464/67464 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 161445 event pairs, 9453 based on Foata normal form. 0/25586 useless extension candidates. Maximal degree in co-relation 103816. Up to 24393 conditions per place. [2023-09-01 12:05:31,528 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 187 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-09-01 12:05:31,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 206 transitions, 2158 flow [2023-09-01 12:05:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:05:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:05:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2023-09-01 12:05:31,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-09-01 12:05:31,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2023-09-01 12:05:31,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2023-09-01 12:05:31,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:31,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2023-09-01 12:05:31,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 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) [2023-09-01 12:05:31,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:31,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 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) [2023-09-01 12:05:31,546 INFO L175 Difference]: Start difference. First operand has 96 places, 171 transitions, 1562 flow. Second operand 3 states and 2076 transitions. [2023-09-01 12:05:31,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 206 transitions, 2158 flow [2023-09-01 12:05:32,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 206 transitions, 2147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:05:32,438 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1534 flow [2023-09-01 12:05:32,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-09-01 12:05:32,439 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-09-01 12:05:32,439 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1534 flow [2023-09-01 12:05:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 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) [2023-09-01 12:05:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 12:05:32,440 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:05:32,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -345962665, now seen corresponding path program 1 times [2023-09-01 12:05:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041099927] [2023-09-01 12:05:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041099927] [2023-09-01 12:05:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041099927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:05:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321369472] [2023-09-01 12:05:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:05:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:05:32,877 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) [2023-09-01 12:05:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:05:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:05:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:05:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:33,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:05:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:33,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321369472] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:05:33,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:05:33,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 12:05:33,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992871815] [2023-09-01 12:05:33,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:05:33,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:05:33,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:05:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 12:05:33,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:05:33,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 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) [2023-09-01 12:05:33,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:33,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:05:33,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:39,228 INFO L130 PetriNetUnfolder]: 21832/30378 cut-off events. [2023-09-01 12:05:39,228 INFO L131 PetriNetUnfolder]: For 89086/89086 co-relation queries the response was YES. [2023-09-01 12:05:39,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112234 conditions, 30378 events. 21832/30378 cut-off events. For 89086/89086 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 168731 event pairs, 6353 based on Foata normal form. 4/26240 useless extension candidates. Maximal degree in co-relation 112120. Up to 27534 conditions per place. [2023-09-01 12:05:39,452 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 176 selfloop transitions, 12 changer transitions 53/241 dead transitions. [2023-09-01 12:05:39,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 241 transitions, 2573 flow [2023-09-01 12:05:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:05:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:05:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2735 transitions. [2023-09-01 12:05:39,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252176616915423 [2023-09-01 12:05:39,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2735 transitions. [2023-09-01 12:05:39,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2735 transitions. [2023-09-01 12:05:39,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:39,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2735 transitions. [2023-09-01 12:05:39,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.75) internal successors, (2735), 4 states have internal predecessors, (2735), 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) [2023-09-01 12:05:39,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:05:39,467 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:05:39,468 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1534 flow. Second operand 4 states and 2735 transitions. [2023-09-01 12:05:39,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 241 transitions, 2573 flow [2023-09-01 12:05:40,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 241 transitions, 2532 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-09-01 12:05:40,155 INFO L231 Difference]: Finished difference. Result has 103 places, 154 transitions, 1463 flow [2023-09-01 12:05:40,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1463, PETRI_PLACES=103, PETRI_TRANSITIONS=154} [2023-09-01 12:05:40,155 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-09-01 12:05:40,155 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 154 transitions, 1463 flow [2023-09-01 12:05:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 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) [2023-09-01 12:05:40,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:40,156 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:40,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:05:40,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 12:05:40,357 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:05:40,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1281119567, now seen corresponding path program 2 times [2023-09-01 12:05:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:40,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456734421] [2023-09-01 12:05:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:40,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:05:40,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:40,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456734421] [2023-09-01 12:05:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456734421] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:05:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:05:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:05:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349752204] [2023-09-01 12:05:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:05:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:05:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:05:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:05:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-09-01 12:05:40,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 154 transitions, 1463 flow. Second operand has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 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) [2023-09-01 12:05:40,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:40,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-09-01 12:05:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:46,360 INFO L130 PetriNetUnfolder]: 23686/33394 cut-off events. [2023-09-01 12:05:46,360 INFO L131 PetriNetUnfolder]: For 83084/83084 co-relation queries the response was YES. [2023-09-01 12:05:46,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116472 conditions, 33394 events. 23686/33394 cut-off events. For 83084/83084 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 193830 event pairs, 10465 based on Foata normal form. 4/29010 useless extension candidates. Maximal degree in co-relation 116370. Up to 25764 conditions per place. [2023-09-01 12:05:46,618 INFO L137 encePairwiseOnDemand]: 1598/1608 looper letters, 216 selfloop transitions, 25 changer transitions 37/278 dead transitions. [2023-09-01 12:05:46,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 278 transitions, 2720 flow [2023-09-01 12:05:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:05:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:05:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3417 transitions. [2023-09-01 12:05:46,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-09-01 12:05:46,625 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3417 transitions. [2023-09-01 12:05:46,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3417 transitions. [2023-09-01 12:05:46,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:46,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3417 transitions. [2023-09-01 12:05:46,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 683.4) internal successors, (3417), 5 states have internal predecessors, (3417), 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) [2023-09-01 12:05:46,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:46,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:05:46,638 INFO L175 Difference]: Start difference. First operand has 103 places, 154 transitions, 1463 flow. Second operand 5 states and 3417 transitions. [2023-09-01 12:05:46,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 278 transitions, 2720 flow [2023-09-01 12:05:47,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 278 transitions, 2671 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-09-01 12:05:47,413 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1399 flow [2023-09-01 12:05:47,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1399, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2023-09-01 12:05:47,414 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2023-09-01 12:05:47,414 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1399 flow [2023-09-01 12:05:47,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 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) [2023-09-01 12:05:47,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:47,415 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:47,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 12:05:47,415 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:05:47,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 774602130, now seen corresponding path program 1 times [2023-09-01 12:05:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349937129] [2023-09-01 12:05:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:47,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:49,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349937129] [2023-09-01 12:05:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349937129] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:05:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136607929] [2023-09-01 12:05:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:49,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:05:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:05:49,970 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) [2023-09-01 12:05:49,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:05:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:50,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:05:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:05:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:50,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:05:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:05:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136607929] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:05:51,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:05:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-09-01 12:05:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685845453] [2023-09-01 12:05:51,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:05:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 12:05:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 12:05:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:05:54,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 595 out of 1608 [2023-09-01 12:05:54,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1399 flow. Second operand has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 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) [2023-09-01 12:05:54,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:54,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 595 of 1608 [2023-09-01 12:05:54,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:06:13,502 INFO L130 PetriNetUnfolder]: 60488/84802 cut-off events. [2023-09-01 12:06:13,502 INFO L131 PetriNetUnfolder]: For 210570/210570 co-relation queries the response was YES. [2023-09-01 12:06:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300185 conditions, 84802 events. 60488/84802 cut-off events. For 210570/210570 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 550289 event pairs, 2556 based on Foata normal form. 95/73114 useless extension candidates. Maximal degree in co-relation 300067. Up to 20483 conditions per place. [2023-09-01 12:06:14,659 INFO L137 encePairwiseOnDemand]: 1584/1608 looper letters, 804 selfloop transitions, 372 changer transitions 215/1391 dead transitions. [2023-09-01 12:06:14,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 1391 transitions, 12469 flow [2023-09-01 12:06:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-09-01 12:06:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-09-01 12:06:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 33514 transitions. [2023-09-01 12:06:14,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894617819990956 [2023-09-01 12:06:14,703 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 33514 transitions. [2023-09-01 12:06:14,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 33514 transitions. [2023-09-01 12:06:14,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:06:14,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 33514 transitions. [2023-09-01 12:06:14,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 609.3454545454546) internal successors, (33514), 55 states have internal predecessors, (33514), 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) [2023-09-01 12:06:14,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 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) [2023-09-01 12:06:14,833 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 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) [2023-09-01 12:06:14,834 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1399 flow. Second operand 55 states and 33514 transitions. [2023-09-01 12:06:14,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 1391 transitions, 12469 flow [2023-09-01 12:06:22,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1391 transitions, 12134 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-09-01 12:06:22,290 INFO L231 Difference]: Finished difference. Result has 202 places, 522 transitions, 6233 flow [2023-09-01 12:06:22,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=6233, PETRI_PLACES=202, PETRI_TRANSITIONS=522} [2023-09-01 12:06:22,291 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2023-09-01 12:06:22,291 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 522 transitions, 6233 flow [2023-09-01 12:06:22,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 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) [2023-09-01 12:06:22,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:06:22,293 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:06:22,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:06:22,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:06:22,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:06:22,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:06:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash 138443101, now seen corresponding path program 1 times [2023-09-01 12:06:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:06:22,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074392821] [2023-09-01 12:06:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:06:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:06:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:06:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:06:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:06:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074392821] [2023-09-01 12:06:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074392821] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:06:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774651191] [2023-09-01 12:06:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:06:22,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:06:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:06:22,878 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) [2023-09-01 12:06:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:06:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:06:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:06:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:06:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:06:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:06:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:06:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774651191] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:06:23,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:06:23,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 12:06:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791382697] [2023-09-01 12:06:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:06:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:06:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:06:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:06:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 12:06:23,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:06:23,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 522 transitions, 6233 flow. Second operand has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 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) [2023-09-01 12:06:23,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:06:23,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:06:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:06:43,106 INFO L130 PetriNetUnfolder]: 56846/79425 cut-off events. [2023-09-01 12:06:43,106 INFO L131 PetriNetUnfolder]: For 820434/820434 co-relation queries the response was YES. [2023-09-01 12:06:44,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415880 conditions, 79425 events. 56846/79425 cut-off events. For 820434/820434 co-relation queries the response was YES. Maximal size of possible extension queue 1911. Compared 509818 event pairs, 20760 based on Foata normal form. 2/71097 useless extension candidates. Maximal degree in co-relation 415718. Up to 78712 conditions per place. [2023-09-01 12:06:45,106 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 514 selfloop transitions, 17 changer transitions 34/565 dead transitions. [2023-09-01 12:06:45,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 565 transitions, 7799 flow [2023-09-01 12:06:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:06:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:06:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2722 transitions. [2023-09-01 12:06:45,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319651741293535 [2023-09-01 12:06:45,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2722 transitions. [2023-09-01 12:06:45,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2722 transitions. [2023-09-01 12:06:45,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:06:45,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2722 transitions. [2023-09-01 12:06:45,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.5) internal successors, (2722), 4 states have internal predecessors, (2722), 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) [2023-09-01 12:06:45,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:06:45,119 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:06:45,119 INFO L175 Difference]: Start difference. First operand has 202 places, 522 transitions, 6233 flow. Second operand 4 states and 2722 transitions. [2023-09-01 12:06:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 565 transitions, 7799 flow [2023-09-01 12:06:58,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 565 transitions, 7622 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-09-01 12:06:58,213 INFO L231 Difference]: Finished difference. Result has 182 places, 520 transitions, 6152 flow [2023-09-01 12:06:58,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6152, PETRI_PLACES=182, PETRI_TRANSITIONS=520} [2023-09-01 12:06:58,214 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2023-09-01 12:06:58,214 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 520 transitions, 6152 flow [2023-09-01 12:06:58,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 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) [2023-09-01 12:06:58,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:06:58,215 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:06:58,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:06:58,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:06:58,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:06:58,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:06:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1248017317, now seen corresponding path program 2 times [2023-09-01 12:06:58,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:06:58,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305170383] [2023-09-01 12:06:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:06:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:06:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:06:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:06:58,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:06:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305170383] [2023-09-01 12:06:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305170383] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:06:58,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:06:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:06:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256945473] [2023-09-01 12:06:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:06:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:06:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:06:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:06:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:06:58,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:06:58,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 520 transitions, 6152 flow. Second operand has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 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) [2023-09-01 12:06:58,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:06:58,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:06:58,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:07:17,289 INFO L130 PetriNetUnfolder]: 56465/78816 cut-off events. [2023-09-01 12:07:17,289 INFO L131 PetriNetUnfolder]: For 749513/749513 co-relation queries the response was YES. [2023-09-01 12:07:18,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393717 conditions, 78816 events. 56465/78816 cut-off events. For 749513/749513 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 504732 event pairs, 27498 based on Foata normal form. 2/70516 useless extension candidates. Maximal degree in co-relation 393584. Up to 78291 conditions per place. [2023-09-01 12:07:18,602 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 508 selfloop transitions, 0 changer transitions 41/549 dead transitions. [2023-09-01 12:07:18,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 549 transitions, 7461 flow [2023-09-01 12:07:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:07:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:07:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2716 transitions. [2023-09-01 12:07:18,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-09-01 12:07:18,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2716 transitions. [2023-09-01 12:07:18,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2716 transitions. [2023-09-01 12:07:18,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:07:18,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2716 transitions. [2023-09-01 12:07:18,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 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) [2023-09-01 12:07:18,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:07:18,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:07:18,613 INFO L175 Difference]: Start difference. First operand has 182 places, 520 transitions, 6152 flow. Second operand 4 states and 2716 transitions. [2023-09-01 12:07:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 549 transitions, 7461 flow [2023-09-01 12:07:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 549 transitions, 7273 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-09-01 12:07:23,439 INFO L231 Difference]: Finished difference. Result has 176 places, 508 transitions, 5792 flow [2023-09-01 12:07:23,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5792, PETRI_PLACES=176, PETRI_TRANSITIONS=508} [2023-09-01 12:07:23,440 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2023-09-01 12:07:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 508 transitions, 5792 flow [2023-09-01 12:07:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 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) [2023-09-01 12:07:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:07:23,441 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:07:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 12:07:23,442 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:07:23,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:07:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1938677828, now seen corresponding path program 2 times [2023-09-01 12:07:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:07:23,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925402571] [2023-09-01 12:07:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:07:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:07:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:07:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:07:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925402571] [2023-09-01 12:07:24,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925402571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:07:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009974438] [2023-09-01 12:07:24,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:07:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:07:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:07:24,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:07:24,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:07:24,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:07:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:07:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:07:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:07:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:24,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:07:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009974438] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:07:25,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:07:25,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-09-01 12:07:25,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838603221] [2023-09-01 12:07:25,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:07:25,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:07:25,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:07:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:07:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:07:25,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 644 out of 1608 [2023-09-01 12:07:25,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 508 transitions, 5792 flow. Second operand has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 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) [2023-09-01 12:07:25,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:07:25,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 644 of 1608 [2023-09-01 12:07:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:07:48,297 INFO L130 PetriNetUnfolder]: 67930/94369 cut-off events. [2023-09-01 12:07:48,297 INFO L131 PetriNetUnfolder]: For 786519/786519 co-relation queries the response was YES. [2023-09-01 12:07:49,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466426 conditions, 94369 events. 67930/94369 cut-off events. For 786519/786519 co-relation queries the response was YES. Maximal size of possible extension queue 2257. Compared 609638 event pairs, 6942 based on Foata normal form. 104/83461 useless extension candidates. Maximal degree in co-relation 466358. Up to 49209 conditions per place. [2023-09-01 12:07:49,803 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 644 selfloop transitions, 92 changer transitions 49/785 dead transitions. [2023-09-01 12:07:49,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 785 transitions, 9791 flow [2023-09-01 12:07:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:07:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:07:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5334 transitions. [2023-09-01 12:07:49,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146455223880597 [2023-09-01 12:07:49,807 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5334 transitions. [2023-09-01 12:07:49,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5334 transitions. [2023-09-01 12:07:49,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:07:49,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5334 transitions. [2023-09-01 12:07:49,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 666.75) internal successors, (5334), 8 states have internal predecessors, (5334), 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) [2023-09-01 12:07:49,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 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) [2023-09-01 12:07:49,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 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) [2023-09-01 12:07:49,820 INFO L175 Difference]: Start difference. First operand has 176 places, 508 transitions, 5792 flow. Second operand 8 states and 5334 transitions. [2023-09-01 12:07:49,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 785 transitions, 9791 flow [2023-09-01 12:07:56,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 785 transitions, 9400 flow, removed 136 selfloop flow, removed 8 redundant places. [2023-09-01 12:07:56,349 INFO L231 Difference]: Finished difference. Result has 171 places, 503 transitions, 5678 flow [2023-09-01 12:07:56,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=171, PETRI_TRANSITIONS=503} [2023-09-01 12:07:56,350 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2023-09-01 12:07:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 503 transitions, 5678 flow [2023-09-01 12:07:56,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 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) [2023-09-01 12:07:56,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:07:56,351 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:07:56,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:07:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:07:56,560 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:07:56,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:07:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash -42288596, now seen corresponding path program 3 times [2023-09-01 12:07:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:07:56,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031978545] [2023-09-01 12:07:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:07:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:07:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:07:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:59,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:07:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031978545] [2023-09-01 12:07:59,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031978545] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:07:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047340290] [2023-09-01 12:07:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:07:59,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:07:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:07:59,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:07:59,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:07:59,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:07:59,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:07:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:07:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:07:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:07:59,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:07:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047340290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:07:59,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:07:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-09-01 12:07:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870437530] [2023-09-01 12:07:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:07:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:07:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:07:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:07:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:07:59,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 648 out of 1608 [2023-09-01 12:07:59,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 503 transitions, 5678 flow. Second operand has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 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) [2023-09-01 12:07:59,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:07:59,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 648 of 1608 [2023-09-01 12:07:59,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:08:21,473 INFO L130 PetriNetUnfolder]: 67509/93682 cut-off events. [2023-09-01 12:08:21,473 INFO L131 PetriNetUnfolder]: For 806584/806584 co-relation queries the response was YES. [2023-09-01 12:08:22,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479197 conditions, 93682 events. 67509/93682 cut-off events. For 806584/806584 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 603787 event pairs, 32241 based on Foata normal form. 52/82724 useless extension candidates. Maximal degree in co-relation 479130. Up to 90312 conditions per place. [2023-09-01 12:08:22,957 INFO L137 encePairwiseOnDemand]: 1603/1608 looper letters, 538 selfloop transitions, 35 changer transitions 40/613 dead transitions. [2023-09-01 12:08:22,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 613 transitions, 7731 flow [2023-09-01 12:08:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:08:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:08:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3350 transitions. [2023-09-01 12:08:22,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-09-01 12:08:22,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3350 transitions. [2023-09-01 12:08:22,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3350 transitions. [2023-09-01 12:08:22,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:08:22,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3350 transitions. [2023-09-01 12:08:22,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 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) [2023-09-01 12:08:22,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:08:22,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:08:22,966 INFO L175 Difference]: Start difference. First operand has 171 places, 503 transitions, 5678 flow. Second operand 5 states and 3350 transitions. [2023-09-01 12:08:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 613 transitions, 7731 flow [2023-09-01 12:08:28,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 613 transitions, 7684 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-09-01 12:08:28,582 INFO L231 Difference]: Finished difference. Result has 174 places, 501 transitions, 5674 flow [2023-09-01 12:08:28,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5635, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5674, PETRI_PLACES=174, PETRI_TRANSITIONS=501} [2023-09-01 12:08:28,583 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2023-09-01 12:08:28,583 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 501 transitions, 5674 flow [2023-09-01 12:08:28,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 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) [2023-09-01 12:08:28,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:08:28,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:08:28,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:08:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:08:28,786 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:08:28,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:08:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1646277518, now seen corresponding path program 1 times [2023-09-01 12:08:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:08:28,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689649999] [2023-09-01 12:08:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:08:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:08:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:08:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:08:29,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:08:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689649999] [2023-09-01 12:08:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689649999] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:08:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494424467] [2023-09-01 12:08:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:08:29,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:08:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:08:29,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:08:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:08:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:08:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:08:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:08:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:08:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:08:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:08:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494424467] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:08:30,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:08:30,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-09-01 12:08:30,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105557790] [2023-09-01 12:08:30,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:08:30,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:08:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:08:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:08:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:08:30,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 645 out of 1608 [2023-09-01 12:08:30,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 501 transitions, 5674 flow. Second operand has 11 states, 11 states have (on average 651.0909090909091) internal successors, (7162), 11 states have internal predecessors, (7162), 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) [2023-09-01 12:08:30,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:08:30,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 645 of 1608 [2023-09-01 12:08:30,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:08:54,626 INFO L130 PetriNetUnfolder]: 70298/98103 cut-off events. [2023-09-01 12:08:54,626 INFO L131 PetriNetUnfolder]: For 833376/833376 co-relation queries the response was YES. [2023-09-01 12:08:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498941 conditions, 98103 events. 70298/98103 cut-off events. For 833376/833376 co-relation queries the response was YES. Maximal size of possible extension queue 2371. Compared 643572 event pairs, 13419 based on Foata normal form. 47/86872 useless extension candidates. Maximal degree in co-relation 498873. Up to 47842 conditions per place. [2023-09-01 12:08:56,531 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 719 selfloop transitions, 78 changer transitions 44/841 dead transitions. [2023-09-01 12:08:56,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 841 transitions, 10289 flow [2023-09-01 12:08:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:08:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:08:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6010 transitions. [2023-09-01 12:08:56,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152846876727474 [2023-09-01 12:08:56,537 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6010 transitions. [2023-09-01 12:08:56,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6010 transitions. [2023-09-01 12:08:56,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:08:56,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6010 transitions. [2023-09-01 12:08:56,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 667.7777777777778) internal successors, (6010), 9 states have internal predecessors, (6010), 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) [2023-09-01 12:08:56,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1608.0) internal successors, (16080), 10 states have internal predecessors, (16080), 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) [2023-09-01 12:08:56,548 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1608.0) internal successors, (16080), 10 states have internal predecessors, (16080), 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) [2023-09-01 12:08:56,548 INFO L175 Difference]: Start difference. First operand has 174 places, 501 transitions, 5674 flow. Second operand 9 states and 6010 transitions. [2023-09-01 12:08:56,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 841 transitions, 10289 flow [2023-09-01 12:09:03,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 841 transitions, 10183 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-09-01 12:09:03,261 INFO L231 Difference]: Finished difference. Result has 181 places, 494 transitions, 5814 flow [2023-09-01 12:09:03,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5495, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5814, PETRI_PLACES=181, PETRI_TRANSITIONS=494} [2023-09-01 12:09:03,262 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2023-09-01 12:09:03,262 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 494 transitions, 5814 flow [2023-09-01 12:09:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 651.0909090909091) internal successors, (7162), 11 states have internal predecessors, (7162), 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) [2023-09-01 12:09:03,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:09:03,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:09:03,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:09:03,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:09:03,464 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:09:03,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:09:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 74568244, now seen corresponding path program 2 times [2023-09-01 12:09:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:09:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900094620] [2023-09-01 12:09:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:09:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:09:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:09:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:09:04,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:09:04,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900094620] [2023-09-01 12:09:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900094620] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:09:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:09:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:09:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022917061] [2023-09-01 12:09:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:09:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:09:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:09:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:09:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:09:04,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 645 out of 1608 [2023-09-01 12:09:04,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 494 transitions, 5814 flow. Second operand has 5 states, 5 states have (on average 651.2) internal successors, (3256), 5 states have internal predecessors, (3256), 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) [2023-09-01 12:09:04,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:09:04,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 645 of 1608 [2023-09-01 12:09:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:09:27,450 INFO L130 PetriNetUnfolder]: 69974/97560 cut-off events. [2023-09-01 12:09:27,451 INFO L131 PetriNetUnfolder]: For 901563/901563 co-relation queries the response was YES. [2023-09-01 12:09:29,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515220 conditions, 97560 events. 69974/97560 cut-off events. For 901563/901563 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 639336 event pairs, 34078 based on Foata normal form. 1/86283 useless extension candidates. Maximal degree in co-relation 515152. Up to 94905 conditions per place. [2023-09-01 12:09:29,537 INFO L137 encePairwiseOnDemand]: 1602/1608 looper letters, 541 selfloop transitions, 33 changer transitions 17/591 dead transitions. [2023-09-01 12:09:29,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 591 transitions, 7688 flow [2023-09-01 12:09:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:09:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:09:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3316 transitions. [2023-09-01 12:09:29,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41243781094527365 [2023-09-01 12:09:29,540 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3316 transitions. [2023-09-01 12:09:29,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3316 transitions. [2023-09-01 12:09:29,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:09:29,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3316 transitions. [2023-09-01 12:09:29,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 663.2) internal successors, (3316), 5 states have internal predecessors, (3316), 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) [2023-09-01 12:09:29,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:09:29,548 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:09:29,548 INFO L175 Difference]: Start difference. First operand has 181 places, 494 transitions, 5814 flow. Second operand 5 states and 3316 transitions. [2023-09-01 12:09:29,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 591 transitions, 7688 flow [2023-09-01 12:09:35,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 591 transitions, 7588 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-09-01 12:09:35,838 INFO L231 Difference]: Finished difference. Result has 182 places, 495 transitions, 5832 flow [2023-09-01 12:09:35,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5832, PETRI_PLACES=182, PETRI_TRANSITIONS=495} [2023-09-01 12:09:35,839 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2023-09-01 12:09:35,839 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 495 transitions, 5832 flow [2023-09-01 12:09:35,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 651.2) internal successors, (3256), 5 states have internal predecessors, (3256), 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) [2023-09-01 12:09:35,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:09:35,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:09:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 12:09:35,840 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:09:35,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:09:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1628884612, now seen corresponding path program 3 times [2023-09-01 12:09:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:09:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972354367] [2023-09-01 12:09:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:09:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:09:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:09:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:09:36,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:09:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972354367] [2023-09-01 12:09:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972354367] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:09:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:09:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:09:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417057312] [2023-09-01 12:09:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:09:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:09:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:09:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:09:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:09:36,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 649 out of 1608 [2023-09-01 12:09:36,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 495 transitions, 5832 flow. Second operand has 5 states, 5 states have (on average 655.2) internal successors, (3276), 5 states have internal predecessors, (3276), 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) [2023-09-01 12:09:36,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:09:36,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 649 of 1608 [2023-09-01 12:09:36,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:09:59,535 INFO L130 PetriNetUnfolder]: 69943/97477 cut-off events. [2023-09-01 12:09:59,535 INFO L131 PetriNetUnfolder]: For 874017/874017 co-relation queries the response was YES. [2023-09-01 12:10:01,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512324 conditions, 97477 events. 69943/97477 cut-off events. For 874017/874017 co-relation queries the response was YES. Maximal size of possible extension queue 2368. Compared 637107 event pairs, 28753 based on Foata normal form. 1/86200 useless extension candidates. Maximal degree in co-relation 512256. Up to 80812 conditions per place. [2023-09-01 12:10:01,469 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 535 selfloop transitions, 14 changer transitions 30/579 dead transitions. [2023-09-01 12:10:01,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 579 transitions, 7693 flow [2023-09-01 12:10:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:10:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:10:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3340 transitions. [2023-09-01 12:10:01,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154228855721393 [2023-09-01 12:10:01,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3340 transitions. [2023-09-01 12:10:01,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3340 transitions. [2023-09-01 12:10:01,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:10:01,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3340 transitions. [2023-09-01 12:10:01,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 668.0) internal successors, (3340), 5 states have internal predecessors, (3340), 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) [2023-09-01 12:10:01,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:10:01,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 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) [2023-09-01 12:10:01,483 INFO L175 Difference]: Start difference. First operand has 182 places, 495 transitions, 5832 flow. Second operand 5 states and 3340 transitions. [2023-09-01 12:10:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 579 transitions, 7693 flow [2023-09-01 12:10:08,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 579 transitions, 7647 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 12:10:08,840 INFO L231 Difference]: Finished difference. Result has 183 places, 493 transitions, 5782 flow [2023-09-01 12:10:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5782, PETRI_PLACES=183, PETRI_TRANSITIONS=493} [2023-09-01 12:10:08,841 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 137 predicate places. [2023-09-01 12:10:08,841 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 493 transitions, 5782 flow [2023-09-01 12:10:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 655.2) internal successors, (3276), 5 states have internal predecessors, (3276), 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) [2023-09-01 12:10:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:10:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:10:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 12:10:08,842 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:10:08,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:10:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1780197605, now seen corresponding path program 1 times [2023-09-01 12:10:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:10:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956895934] [2023-09-01 12:10:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:10:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:10:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:10:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:10:09,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:10:09,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956895934] [2023-09-01 12:10:09,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956895934] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:10:09,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:10:09,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:10:09,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4652951] [2023-09-01 12:10:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:10:09,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:10:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:10:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:10:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:10:09,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-09-01 12:10:09,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 493 transitions, 5782 flow. Second operand has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 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) [2023-09-01 12:10:09,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:10:09,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-09-01 12:10:09,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:10:32,025 INFO L130 PetriNetUnfolder]: 69904/97383 cut-off events. [2023-09-01 12:10:32,025 INFO L131 PetriNetUnfolder]: For 900925/900925 co-relation queries the response was YES. [2023-09-01 12:10:33,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513365 conditions, 97383 events. 69904/97383 cut-off events. For 900925/900925 co-relation queries the response was YES. Maximal size of possible extension queue 2378. Compared 631914 event pairs, 18599 based on Foata normal form. 186/86261 useless extension candidates. Maximal degree in co-relation 513298. Up to 94247 conditions per place. [2023-09-01 12:10:33,599 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 508 selfloop transitions, 31 changer transitions 0/539 dead transitions. [2023-09-01 12:10:33,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 539 transitions, 7071 flow [2023-09-01 12:10:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:10:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:10:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2730 transitions. [2023-09-01 12:10:33,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244402985074627 [2023-09-01 12:10:33,601 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2730 transitions. [2023-09-01 12:10:33,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2730 transitions. [2023-09-01 12:10:33,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:10:33,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2730 transitions. [2023-09-01 12:10:33,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 682.5) internal successors, (2730), 4 states have internal predecessors, (2730), 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) [2023-09-01 12:10:33,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:10:33,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:10:33,606 INFO L175 Difference]: Start difference. First operand has 183 places, 493 transitions, 5782 flow. Second operand 4 states and 2730 transitions. [2023-09-01 12:10:33,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 539 transitions, 7071 flow [2023-09-01 12:10:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 539 transitions, 7053 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:10:41,976 INFO L231 Difference]: Finished difference. Result has 182 places, 477 transitions, 5697 flow [2023-09-01 12:10:41,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5697, PETRI_PLACES=182, PETRI_TRANSITIONS=477} [2023-09-01 12:10:41,977 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2023-09-01 12:10:41,977 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 477 transitions, 5697 flow [2023-09-01 12:10:41,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 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) [2023-09-01 12:10:41,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:10:41,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:10:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 12:10:41,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:10:41,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:10:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1745815563, now seen corresponding path program 1 times [2023-09-01 12:10:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:10:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45706111] [2023-09-01 12:10:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:10:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:10:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:10:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 12:10:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:10:42,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45706111] [2023-09-01 12:10:42,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45706111] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:10:42,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:10:42,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:10:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829187156] [2023-09-01 12:10:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:10:42,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:10:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:10:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:10:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:10:42,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 663 out of 1608 [2023-09-01 12:10:42,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 477 transitions, 5697 flow. Second operand has 4 states, 4 states have (on average 671.25) internal successors, (2685), 4 states have internal predecessors, (2685), 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) [2023-09-01 12:10:42,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:10:42,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 663 of 1608 [2023-09-01 12:10:42,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:03,808 INFO L130 PetriNetUnfolder]: 69518/96753 cut-off events. [2023-09-01 12:11:03,808 INFO L131 PetriNetUnfolder]: For 889616/889616 co-relation queries the response was YES. [2023-09-01 12:11:04,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511406 conditions, 96753 events. 69518/96753 cut-off events. For 889616/889616 co-relation queries the response was YES. Maximal size of possible extension queue 2377. Compared 625687 event pairs, 18709 based on Foata normal form. 6/85547 useless extension candidates. Maximal degree in co-relation 511338. Up to 95505 conditions per place. [2023-09-01 12:11:05,280 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 489 selfloop transitions, 38 changer transitions 2/529 dead transitions. [2023-09-01 12:11:05,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 529 transitions, 7129 flow [2023-09-01 12:11:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:11:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:11:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2738 transitions. [2023-09-01 12:11:05,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42568407960199006 [2023-09-01 12:11:05,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2738 transitions. [2023-09-01 12:11:05,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2738 transitions. [2023-09-01 12:11:05,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:05,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2738 transitions. [2023-09-01 12:11:05,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 684.5) internal successors, (2738), 4 states have internal predecessors, (2738), 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) [2023-09-01 12:11:05,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:11:05,290 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 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) [2023-09-01 12:11:05,290 INFO L175 Difference]: Start difference. First operand has 182 places, 477 transitions, 5697 flow. Second operand 4 states and 2738 transitions. [2023-09-01 12:11:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 529 transitions, 7129 flow [2023-09-01 12:11:11,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 529 transitions, 7097 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:11:11,861 INFO L231 Difference]: Finished difference. Result has 185 places, 475 transitions, 5728 flow [2023-09-01 12:11:11,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5728, PETRI_PLACES=185, PETRI_TRANSITIONS=475} [2023-09-01 12:11:11,862 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2023-09-01 12:11:11,862 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 475 transitions, 5728 flow [2023-09-01 12:11:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 671.25) internal successors, (2685), 4 states have internal predecessors, (2685), 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) [2023-09-01 12:11:11,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:11,863 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 12:11:11,864 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:11:11,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 277703643, now seen corresponding path program 2 times [2023-09-01 12:11:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340048798] [2023-09-01 12:11:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 12:11:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:12,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340048798] [2023-09-01 12:11:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340048798] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:12,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:11:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:11:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502614975] [2023-09-01 12:11:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:11:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:11:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:11:12,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-09-01 12:11:12,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 475 transitions, 5728 flow. Second operand has 4 states, 4 states have (on average 670.25) internal successors, (2681), 4 states have internal predecessors, (2681), 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) [2023-09-01 12:11:12,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:12,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-09-01 12:11:12,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand